Here are three shops selling men’s non-leather shoes, belts, wallets, etc. in the USA and UK
Brave Gentle Man in the USA offers footwear, belts, wallets, jackets, suits, and more. https://www.bravegentleman.com/
No Harm offers men’s boots, shoes, wallets, and belts. They have offices in both the USA and the United Kingdom. https://www.noharm.com/
Vivari in the USA offers men’s belts and wallets handcrafted in Italy. https://vivariwear.com/