Copper vid card sinks

Well not specifically for the GF3, but SubzeroPC.com has plenty that should work.

- Tempus fugit donec vestrum relictus tripudium. Autem amor praeterea magis pretium.
 
Any copper heatsink will do, as long as it's not too tall. Try to stay below 15mm. Also, the largest 'contiguous' heatsink will give you a little extra performance over smaller individual sinks.