Seeing as this topic has gone a bit off topic anyway...
Ordered in some o-rings at my local ford main stealers, just a simple 1 1/4" black o-ring. Said I'd take two, to which the guy said they're £8.95 each!! So I've bought one in the vain hope my local BTL shop can sort me out with some. I had to buy one as mine are shagged and deformed, so hopefully with the dimensions and such I can pass onto those at MEG.