Hi James
I've found a set - see photos for condition. Slight nibble to the bottom of one of the rears. Please PM me if interested (collection from Cheltenham when/if lockdown restrictions are eased. If you need any other parts, I might have them).
If anyone else is looking for doorcards, I've got others - blue tartan, black and a rare set of dark brown ones from my first R4, a 1970 TL.