http://www.overclockers.co.uk/showproduct.php?prodid=CA-006-LA&groupid=701&catid=123&subcat=2057
http://www.overclockers.co.uk/showproduct.php?prodid=CA-116-AN&groupid=701&catid=123&subcat=1088
http://www.overclockers.co.uk/showproduct.php?prodid=CA-004-XF&groupid=701&catid=123&subcat=1497
Either of those three, your specs were ok for what you currently have, but it is old and isnt designed like a modern PSU is.
Thanks mate, very helpful. Your right it is getting on a bit and won't have modern design or components, just trying to save a few bucks