I've had a lot of rough landings with my FC40 and now I'm down to my last 3 white rubber dampeners. I've not had much luck finding replacements...any suggestions? I'm not even sure if they are referred to as "rubber dampeners" (see attached picture).

I used twist ties to secure my anti vibration parts. You could use string too. Just snake it thru the holes. It may come apart but you lose the little suckers. I also drilled a small hole in the camera mount and used string to attach to the phantom so I don't lose the whole thing. Takes 5 minutes.

Grommets.