Which wallet goes best with a B. Bag?

The B. Wallets are available in 3 different sizes - the continental size that's already been posted here, medium (pretty much looks the same as the bigger one with same size buckle), and small (with smaller brass b.buckle that looks like the one on Dr. B bags). There is a coin purse also with the b. buckle. Different colors/materials other than the ones shown here are probably gonna be hard to find but they are out there.