you'll get some from MAPLIN electronics.
i'm sure theres one in chester.(boughton), by the old glyn web

got the vinyl for heater controls an engine cover through a firm called vinyl-depot on ebay, u can get absolutely any vinyl off them from plain 1 colour right through to marble effect vinyl, anythin at all m8 an it was here within 2 days! got a roll of 6mm checkered 550mm wide x 3 metres in length for 99p plus bout £2 postage, now thats a bargain, wot i found was that it doesnt seem to be that sticky, as in when i offered it up to the engine cover it didnt seem to stick at all till i got the hairdryer on it, now u cant get the bastard off!!

well tried and failed!!!

the vinyl i had, had a defect in it so it had a small line runing all the way down the roll! so that was that knackered, but while i had it on the car i thougt i'd have a play with it, n could i fcuk get it wrinkle free, only atttempted the front part of the roof but still couldnt get it good......anybody wanna have a go if i get more vinyl?