One cheap repair you can do if you want to tidy the rubbers up is: remove them from the bike, cut some black electrical heat shrink to roughly fit (bit bigger), cover the rubbers in black mastic/rubber sealer (sorry not sure of trade names), whilst the mastic is wet slide on the heat shrink and using a heat gun (or carefully with your gas ring) shrink it to fit, allow to cool and mastic to set overnight, trim and excess shrink wrap and re fit to bike. Job Jobbed 