Default Looking for a wallet case

Hey guys,

A friend of mine had a case for his iPhone that had a tiny slot that could hold a few credit cards and maybe a few dollar bills.

It looked something like this:

Is there anything similar for the Nexus 5? I didn't find anything on Ebay or amazon aside from stick-on pocket, and ones that flip open like a book, which isn't what I'm looking for. Any tips would be appreciated!