Last year I needed an on/off button to fit into my Macintosh IIci. I couldn't find a nice model online so I fired up Cinema 4D and designed a model based on the one inside my IIsi. I have just uploaded the STL file to Thingiverse and for anyone who may be interested the link is:
www.thingiverse.com

Macintosh II and Quadra rear on/off power button by croissantking
This is the little rotating power button that fits through the rear panel of quite a few different 68k desktop Mac models, including the IIsi, IIcx, IIci, IIvi, IIvx, Quadra 650, Quadra 700, Quadra 800 and maybe others. They go missing. I needed one for my Macintosh IIci but could not find...



