can you buy parts for rear springs ?

Gee, I am asking a lot of questions.

The rear springs off the '75 Duster are quite good but the rubber around the rings to bind them are gone. I took them to a local heavy equipment shop today to be re bound and they suggested ..and they weren't sure..that a company about an hour and a half away could do this. I really don;t care if they are connected the same way because this isn't a show car restore.

Are there parts available and can I do this myself with minimal tools ?

I did check with the usual companies and didn't see anything listed.

Thanks
ian.