Hey mate, thanks for the info, ive done a little research for you.
Below are links to very reputable companys in the UK, please read the reviews they are very handy.
AGP XFX 6200 Innovision GeForce 6200 256MB DDR2 64Bit AGP Graphics Card - Ebuyer
AGP FX 5500 Gainward 5500 256MB VGA DVI TV Out AGP Graphics Card - Ebuyer
Both have ok ratings, and are not really ideal for gaming, thou they can play games like Half life 2 and Counter strike: source on Mid settings.
They sound fine for your usage, thou personally I'd save up a little and perhaps buy:
Sapphire RADEON X1650 PRO 512 MB Sapphire X1650Pro 512MB DDR2 VGA DVI TV Out AGP Graphics Card - Ebuyer
It has a better core clock speed but slightly more expensive, but unfortuantly im not 100% on how much your willing to spend etc so read the reviews on those other two cards and see how it goes.
Sorry if the above cant help.