Ebuyer.com. If it were me I would probably go for a 2nd hand ebay special mate. An ATI 7000, that's an AGP slot so make sure you buy the correct one fella.

http://cgi.ebay.co.uk/ws/eBayISAPI.d...MESE:IT&ih=018

Something like that, but I am biased as I am selling it. Actually, what is the rest of your dads spec? as an x1950 may well be overkill.