Thanks Richie. Funny enough I am just looking at EBuyer now.
My current PSU is a 250W. Most of the eBuyer ones are double that, so that might be a better start. Just struggling through the specs at the moment to find one that will physically fit (as I don't want to butcher the case), and also to find one that should offer the right cables.
-------------------- I loved my grandmother very much.......and she fetched a good price on eBay.