I went out and bought a pistol case, from a local outdoors store. If anyone has any questions after reading this, I’d be happy to answer them.
The pistol case came with a bunch of foam so you can have multiple layers for storing pistols (not in MY case). I took the top layer and cut holes out of the foam. I used a 1.5" PVC coupler as a template. Then I glued another piece of foam to the bottom to create a cup in the foam circles. The yoyo’s fit snug, no rattling around. In the bottom, I glued down some pieces of hard foam (very plastic feeling, not styrofoam) to create ‘shelf’ for the top foam to sit on evenly, and to have a space for accessories. In the bottom I can keep my strings, silicone, razorz, lube, and a small pouch where I keep all of my spare bearings, shims, caps, etc. etc.
It cost me about $15 plus time. And best yet, it’s lockable! It was a fun project, and is so very useful. In the last picture you can see the PVC coupler and exacto knife I used to cut holes; the seam where I glued the pieces of top foam together; the key that allows me to lock the clips of the case to thwart intruders; and the contents of my blue pouch. I hope you all enjoy it, and maybe it’ll give someone ideas!