Salvaged Curved Circuit Board 
Board is approx 6-5/8 x 2-5/8 x 3/8" (all the little silver square w dark spots are buttons)
Various holes available to attach things to it. Some, if not all of the bits and pieces can be removed 
with a soldering iron. and wicking material.
Caveat - working with circuit boards need to be approached with caution, if they are being cut,  protective gear should be worn (mask & googles) so as not the get particles where you don't want them. Finished artwork should be sealed if it will be worn or handled. Do your own research just to be safe. FYI I handle these without gloves so can't say whether the electronic properties of these are functional.