Liquidic28 Perform a search on, "68 Riviera headlight motors". by NorthernRiviera. There is a lot of stuff there how to easily convert 68-69 Camaro RS canisters to fit your Riv. New RS canisters are available from Yearone.com. Per. :beer
I believe 65 and 66 both used electric motors. Not sure of the 67s. I know 68 and 69 are the same. The 69 Camaro cans work great, but need a length of rod added to the plunger (be careful not to heat too much of the rod when welding or you'll melt a hole in the bladder). Also, I understand the nipple for the vacuum line needs to be massaged a bit to prevent interference on a part of our bumper or frame. But the alternative is finding expensive, leaky, rusty, ugly originals that just won't work. Heck, I might as well start modifying them and selling them myself...
Instead of welding a length of rod the the plunger, I wonder if you could thread the rod and install some sort of a turnbuckle and a rod end (heim joint). It would make it adjustable like the originals. Jason