1972 Duster restore parts needed

I need help finding parts for my 1972 Duster Restore. Am past the half way point of my restore. I need a couple more parts to finish. My painter is asking for the rubber bump stop that goes between the rear bumper and the body right below the tailight. Am not sure what its called or how to find the part. Second part is the wiper arm gasket. Am trying to find new ones. Third is nice rear window. Am in No.California

Thanks,
Fuji