@jp.oog is also now refurbishing switchgear (worn out soft touch).
I swear by Febi Bilstein for small components as they do an awful lot of them and they are readily available once you work out which one you need (for instance sensors, oil cap, coolant cap, fuel tank cap etc.). Suspension parts - Febi-Bilstein, TRW, Lemforder, Meyle - you won't really go wrong with any of those.
Most things OSS -
@Kleynie
Engineering of other parts including OSS -
@depronman
Was beaten to naming
@A2Steve and
@Clackers for almost all parts from dismantlings but would have done so had it not been posted above.