Here's one from the guy I bought my wallet from. I believe it's a one-man operation out of Hong Kong. I'm pretty sure I discovered him on Etsy (or a similar site) and the minimalist style and quality materials was just what I was looking for.

Mine is just a simple billfold, and at nearly 3 years old, I can't imagine it ever failing. However, I don't know about the keyring holding up forever! Perhaps as long as you don't snag it too often.