http://www.ebay.co.uk/itm/DC-12V-6A-...item4aaae69f41
Something like this?
there's quite a few different ones in different power ratings and from different sellers, i've got a 29amp one and it's been great, had it atleast 3 years now, think i paid £30
I chose to modify it, as the connections are made with a strip of screw terminals and i was worried about pulling the wires out, especialy the mains, so i removed the screw strip, soldered wires stright into the board, then tywrapped them tight to the case, put sockets on the end of the outputs, job done