You can almost find anything on eBay. My Canon 17-85mm lens had stopped working when I changed the aperture setting, the camera displays an error 99. I found an iris assembly for less $25 with shipping, works great now. The Canon repair shop wanted over $400 to fix. The easy part of repairing the lens was taking it apart, if you take a lot of pictures is easier to put it back together - but I forgot to do it.
I remember when I was young, my dad had a clock from Japan and it stopped working. I open it up and the parts started flying out, it had a lot of missing parts.
I found a mustang gas tank for our RV generator that I converted from propane to gas. Parts for my jet ski, quads, etc... I normally buy from eBay seller that has more than 95% positive feedback.
The flex circuit broke due to bad design it has a small tight turning radius for zooming.