Contact dermatitis-footwear

Hello,
From when I was about 2 years old I had a "dermatological allergy" where my feet were itching me (especially in the summer),
Only recently (I'm 19), after having some allergic tests, I found out that I had an allergic reaction to "nickel" (or mainly nickel's resins) and also to "chromate potassium". These, are a key substance for most of the shoes as far as I know.

So my question is, whether you can recommend to me any companies from wcich I can order shoes that don't have these substances (like "dermapedic footwear"). Thank you in advance for any information you can give me on that (or what else can I do/avoid)