85' VF500F rear brake caliper questions

I'm doing a rebuild of the rear brake caliper on my bike , the piston o rings are all chewed up, and the various caliper boots are quite old. Is there a generic alternative to buy these rubber parts or do I have to get a rebuild kit? I know fortnine sells a rebuild kit but not for the rear caliper. Does canadian tire carry o rings I can use? Another store?

 

i doubt you'll never find the right parts except from HONDA. don't scraP YOUR ORIGINAL parts until you have good honda replacements in hand, and don't consider any chinese parts !!!!!!!!!!!!!!

 

All of the parts to rebuild the entire caliper are still available from Honda.

 

Honda seems to be pretty good at continuing supply of many maintenance-level parts and they seem to be reasonably priced in the main.

https://www.partzilla.com/catalog/honda/motorcycle/1985/vf500f-a-500-interceptor/rear-brake-caliper