I don't know if the Camaro parts are a direct fit. What car man602 says about lowering the car may be correct (and his advice to verify fit is sound). I've purchased other suspension parts off that site for my 69 Nova, so I keep it as a resource in my bookmarks.
I wish I could be more help, but the only thing I know for sure is that the two spares that I have are off of a Nova. New ones aren't that expensive, but if you can't find them, mine are available.