Autoleads.co.uk is always a good bet, they seem to keep fairly up-to-date. As Paul said, the good thing about the stereos in new cars is that they are almost always bigger than DIN, so you're laughing even if you had to make your own dash adaptor (i believe someone made one for one of the big audi's).

My new car purchase was made with the empeg at the forefront. Which reminds me, I really should get round to installing it. Anyone know how to remove the PAS reservoir on a Clio 172? Anyone???