I do not, and I wish I could make one. I started by buying one of those cheap music box kits... not realizing that the scale was simply C Major. That didn't work.

I am fortunate to work with a mechanical engineer who is also an amateur musician. So, we built our own. It was neither easy nor efficient (nor cheap if you don't know someone with all of the tools who is nice enough to donate their time), but we got it working in the end.