I know the OP got his case already, but if anyone else is looking for one, here’s what I bought, works well:
I got mine on eBay for $10 + $10 shipping, brand new. Has two layers of foam in the case, each about 1 1/2" deep, and scored into 1/2 inch squares that you can pop out with your fingers to make square holes for yoyos. I laid mine out to fit up to 15 on one layer. I not doing anything with the second layer (underneath the top layer that’s being used), so its just a very deep case at the moment - but later on if I want to add more yoyos, or store accessories underneath, I’m thinking I could put a piece of masonite under the top layer and handles to lift it out to get at the bottom layer.