Best Merchants for 0 Crafting Builds?

[NumberTJ47]

I've recently been trying to beat the game without using psi or crafting. It's been going well so far, but there's still a few items I haven't been able to find a renewable source for that'd be extremely helpful.
I've already found some great meds sold by the Formedicator (Turns out Persuasion IS truly useful for something.) He sells Focus Stim and Bullhead, along with stuff I don't need, like psi meds and Hypercerebrix.

Here's a list of what I'm looking for:

• Irongut from the Ferryman at Port Ceto. I'm not sure whether I have to join the pirates to have a renewable source of Irongut. Does the Ferryman still go to Ceto if I get rid of the pirates?
• Jumping Bean. Not critical, but my build uses evasion so it'd be nice to have.
• Aegis. The wiki says this can be found as random loot, but if anyone knows a merchant that sells it please let me know.
• Toxic Gas Grenades. This might be the most painful thing to be missing. I got in the habit of spamming these in my last playthrough because of how cheap and OP they were. I'm sure I won't be able to spam them anymore, but just having a few for the hard fights would be great.
• I could use a source of rare bullets. Haven't found anyone that sells many of them.
• Taser. Can't seem to find anyone that sells these, which is too bad because they're absolutely fantastic.

[Eidein]

Oculus can sell aegis, toxic gas isnt sold but you dont need it unless you are a noob! Taser isnt sold, special ammo isnt sold, jumping bean ive seen from oculus or freedrones guy.

[NumberTJ47]

Oculus can sell aegis, toxic gas isnt sold but you dont need it unless you are a noob! Taser isnt sold, special ammo isnt sold, jumping bean ive seen from oculus or freedrones guy.

Huh, that's weird. The wiki says seems to say that Jumping Bean isn't sold in shops. I figured there was a good chance it was wrong because the wiki page hadn't been updated since 2016.
The wiki also confirms that Constantine sells aegis like you said, but I don't see him selling any other meds. Wouldn't Phyllis be the one to sell it?
Funny, despite most special ammo not being sold, 25mm Concussive Grenades happen to be the ones I really want, and they happen to be an exception.

Thanks for your help. Hopefully I'll be able to finish the run despite figuring out that my build is monumentally ass in the middle of my playthrough.
Honestly, not having psi feels even worse than not having crafting for a sword build. At least I can run Rathound Regalia + Claymore/Red Dragon, but not having Psychokinesis or Temporal Manipulation really sucks. Hell, I'd take Thought Control at this point. At least then I'd have some CC.

[harperfan7]

• Irongut from the Ferryman at Port Ceto. I'm not sure whether I have to join the pirates to have a renewable source of Irongut. Does the Ferryman still go to Ceto if I get rid of the pirates?
• Jumping Bean. Not critical, but my build uses evasion so it'd be nice to have.
• Aegis. The wiki says this can be found as random loot, but if anyone knows a merchant that sells it please let me know.
• Toxic Gas Grenades. This might be the most painful thing to be missing. I got in the habit of spamming these in my last playthrough because of how cheap and OP they were. I'm sure I won't be able to spam them anymore, but just having a few for the hard fights would be great.
• I could use a source of rare bullets. Haven't found anyone that sells many of them.
• Taser. Can't seem to find anyone that sells these, which is too bad because they're absolutely fantastic.

Ferryman always goes to every location, even if everybody is wiped out. 
Theres a few beans in the game but I'm not sure I've seen merchants sell them; you'll never find enough regardless.
I've seen Becket the drones merchant sell aegis, but not normally; looking at Eideins post maybe bean and aegis are just very rare sells from certain merchants.
You won't find special ammo from merchants (it can be found in loot, very rarely), but mercantile opens up a lot more jhp/w2c from certain people.
0 tasers to be found in the game.