We are after an flush fitting filler cap for our car but they seem to be very expensive. Anyone know of a cheap source/alternative? Would you believe that Demon Tw**s seemed to be the cheapest (until we phoned them up and they told us they hadn't started making those parts yet!).

DT good but v expensive. try http://www.raldes.co.uk

Already tried Rally Design (slightly cheaper than others but still £60 + VAT). DT have got the cheapest one I've seen in their catalogue... its just not available yet.

Make sure the DT one has all the right bits you need to fit it from behind to the filler pipe, a lot of theirs are just for show on boy-race-mobiles.

Have a go at http://www.thinkauto.com

The Fiat 127/Panda/Uno use a simple surface one. Locking cap if you look around. Cost me £2 but a pain in the bum to remove.