I want to put in polybushes in the front wishbones, Where is the best place to get some??

All the kit manufacturers like MK.

GTS has a good supply of them, any size

Chester Sports Cars sell direct replacements for the Avon bones.

Pat...

Apologies for being dense but are poly bushes just better spec bushes than the standard OEM ones?

Thanks,

in a word, yes.

there's more to it than that but basically, yes!