Sites and links I've found on the Club Forum that may help you out or be of interest. Non Club sites in Italics - WIP...

Parts:

Porsche Parts Catalogue (all models): Click here or alternate route here

Rose Passion: Click here

Just Campers (944 CV joints possibly sell for 3.2 too?) Click here here here 

Small Parts: Bresco here here or Alpo for screws, clips brackets here - original post also recommends Rose Passion here

Vehicle History

Suggestions made on getting past vehicle history: Click here

Certificate of Production, previously Certificate of Authentication - free for PCGB members: Click here here here Late 2018 this free Club benefit has been withdrawn

Valuations for PCGB member vehicles: Click here

Note: I hope they help - I haven't tried all these tips or suppliers so any you use are at your own risk- Region and Register T&Cs apply.