OK....I'm going to mount 185/60 x 13 Toyo R888s on the 6 x 13 "pepperpot" wheels. The car is going to be used primarily for hillclimbs and time trial events. Regarding spares, I have a spare car (also a 1980), it is very rusty but mechanically sound, so that will help. Also, some spares did come with the car, heads, hubs, bearing carriers, etc. Yeah, I have bought some items from BAT recently but it doesn't seem like there is much left in their inventory. I also have a 1967 Ford Cortina Mk1 so I am familiar with part sources in the UK for Euro Fords. I get a lot of stuff from Burton Power...and ebay, especially ebay UK can be a good source for Fiesta MK1 parts.