Wow!
Thanks fellahs for the help - Greame thanks for the picture - I did ring that bloke in Queensland you put me onto in the Kit for W1 Carb thread & he did get back to me. So Ive got that sorted.
The tyres........turns out there's a mob in Melbourne (Antique Tyres) who do get the 18's in a chevron pattern but they are about $700 Australian each.
Still, I suppose you'd only have to buy them once.