AMD 6990M just died on my Sager NP8170

Hello all, my amd 6990m died today, it had a good run and even bought a couple more months with the oven method, however now I'm in the market to replace it, all i know is the 7970m v1.2 is an option since i have a sager NP8170. My real question is what are my other options and where can i get them? preferably one that isn't too expensive since i will probably use this laptop for maybe 2 more years. I live in the US if that helps.
Thanks in advanced.