That's a really good question. I've not had much experience with replacing mobile components. Did you check with the manufacturer?
At one point I found a few sites that would let you configure the parts you wanted with DIY OCZ laptops...you buy the shell and put in the parts. I can't find them right now, but something like that may have it.
2 things, why are you sure it's the video card at fault for whatever is happening? And 2, does the computer have a removable video card? Laptops are a different breed, you can't just swap out a video card in one like you can on a desktop for the most part.
Yes I've already opened it up, blew out the dust and removed the card. It's a stand alone card. Funny how you can't really find laptop parts around the country, when the tread is moving that way as a more popular way of computing. Where's Newegg.com on this one!