Not sure of the club needs something like it either, but I thought, I want to compile a list of spares that I might need at some point in my vans life.
You never know when you see a part - and think, "I'll chuck that in my spares bin" if you're ever out and about at a show/parts/swaps meet etc.
So, I thought about these things so far:
spark plugs x 4
HT leads
Rotor arm
Disty cap
Fuel pump
Water pump
Washer pump
wiper motor
wiper blades
slave cylinder
master cylinder
belt (alternator one can't remember its name)
air filter
fuel filter
Any thing else to add?
Oooh Oooh - nearly forgot the all important GAFFA TAPE

Sarah x