Slimline graphics cards?

I need to buy a slimline graphics card, ie one that is half the width of a normal card. It is for my works Dell Vostro 200S slimline desktop:

http://pcworld.uol.com.br/idgimages/200707/vostro_200_dt_300.jpg

Does anyone know of any slimline cards that will fit in it so I can get dual monitor?

Dell have quoted me for a NVidia Quatro NVS 290, but they want £130 inc VAT for one. Are there any thats cheaper?

Cheers

ebuyer sell it for around £75 HP NVIDIA Quadro NVS 290 - Graphics adapter - Quadro NVS 290 - PCI Express x16 - 256 MB DDR II - Digital Visual Interface (DVI) - Ebuyer