This is what I've been using and I like it a lot. It fits all my credit, debit, store, gift, discount, insurance, you name it cards. This version is for females... Amazon has a few nice options, reasonably priced as well.
Does it have to fit in your pocket?
GintaXen makes a 12 card wallet that, to me, seems to be the largest wallet that will fit in a standard pocket. Its RFID blocking, and also holds 2 passports along with 20 bills.
marked "Genuine leather" and it has a brass ring, so you can attach it to a wallet chain for added security.
You might take a look at Etsy. You may even have an offer from Amex. I see +1k MRs for $40+ spend at Etsy.
I use a large wallet from Coach, but $100 there will only get a small card case. Also, the clam shell design I like was discontinued years ago in favor of "strip" and "accordion" wallet designs.
*Another option...the one I'm gradually shifting towards...is to only carry a few physical cards and rely primarily (not exclusively) on mobile payments.