I was installing a water block on my 6990 and a little spring-loaded screw jumped out and went MIA in my den. Kind of a bummer - I think I could install the card without the screw but I'd rather not.

Does anyone know where to get a replacement?

The screw I'm talking about is one of four that hold the square-shaped retention bracket right behind the GPU chip. Dual-GPU cards have two of these brackets, single-GPU cards have one. There are four little screws and four springs per bracket. I found the spring. I just need the screw.

Annoying as hell. Anyone any ideas?