I've got an old mate from school who got into the car audio business, he's in Wolverhampton if that's any help? I don't know if he still does it, but he might be able to sort you out?
 
im having two 12" squares and 1 amp on show , all hifonics stuf, car audio centre are just as a rip off lol, n they dont no what there doin in there now!!!