I'd go for a cheap second hand or old card, but if you want it from a place you can trust:
http://www.overclockers.co.uk/showproduct.php?prodid=BG-326-AS&groupid=595&catid=683&subcat= Nothing wrong with B-Grade.
http://www.overclockers.co.uk/showproduct.php?prodid=BG-326-AS&groupid=595&catid=683&subcat= Nothing wrong with B-Grade.
