The LGA 775 is discontinued from what I hear so you're better off upgrading to a newer socket type even if it'll cost you your CPU. Just sell it and move on to 1155/1156.

I found one on Amazon but it's quite overpriced:
http://www.amazon.com/XFX-MB-750I-72P9-NVIDIA-Motherboard-Gigabit/dp/B00...

@Runner1409, I bought mine from Virgin so they must have had it there, well, unless I have Alzheimers or something :P