It's an eBay jobby. Took me ages of searching, you can get cheaper ones but they're mostly plastic. This is completely metal but was still cheap.
My stipulation was 7", side mount, and metal. You struggle to pay under £50 for that. You can get headlights for about £25, but they're really crappy.
It's this one:
http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWNX:IT
Gaz