I literally just googled "memphis leather shop" and went and looked for something suitably thin. It was like 30 bucks for a pretty big piece, I've made two wallets (one for my dad for father's day) and still have tons left.
Things you will need: leather of your choice, thread, needle, awl, bone folder (or letter opener, or pen- something to crease your folds with), water, towel, pencil, scissors, superglue if you are very lazy like me
I made the pattern out of paper and then traced it onto the leather to cut out. You can also get practice about where the folds go. I can edit dimensions into this post if people really need it, but I just folded the paper around a credit card and gave some space on all sides and went with it. I don't know the measurements but I can measure it if needed
crease the main body as shown, fold side flaps over like this.
fold along your diagonal creases (45 degree angle folds btw) into an accordion to make the pockets of the wallet.
cut a coin pocket a little less wide than the middle section of the main wallet, and with the two body sections a bit less "tall" than the height of the rectangle in the middle of the pattern (see first image and its the middle section). make the flap however long you want, some people fold it over all the card slots too. crease as shown.
fold up the pocket and slide it into the middle accordion fold.
you can optionally cut a rectangle the same size as one side of the coin pocket to divide the front card slot into two slots. this is what I did.
slide that into the front accordion fold.
Once you've made this paper version, get out your leather and a pencil. trace the pieces onto the leather and cut them out. you may have to shave down some dimensions due to the leather's thickness, but wait until you've tried putting it together before you cut! losing a millimeter off a side is way better than having to recut or buy more leather.
To fold the leather, put a metal ruler or some kind of straight edge to fold over, then press on the fold with your bone folder or pen or envelope opener or whatever to crease it. It will help if you wet the leather down with a towel before you try to crease it hard. Put the leather wallet together the same way you did the paper. If everything fits together and you don't need to trim anything, you are ready to sew it together!
Okay I was wrong in my earlier post, there are 10 stitches in the wallet. basically you just need to punch through the top and bottom of each fold of the accordion and the pocket or divider beneath. This is hard to explain in words, but here is a picture which hopefully helps?
you do the same thing on the other side. you need to then sew through the punched holes. 15 loops should do it. You can try to knot the thread off, but I couldn't find a way to do it inside the fold. I just tucked the end into the fold and put a tiny dot of superglue in there.
I also sewed the top folds together so they wouldn't open as much.
That's really it! You could sew a cross into it if you really want it to be like MA+.
...that was a long post! I expect to see some pictures of you guy's wallets after all that work
It's a really good idea, thanks for sharing!