Anyone purchased a replacement video card fan?

[BobTheSlob]

I purchased this fan
http://www.directron.com/ec4510m12sb.html

and it didn't fit on my Tyan G9800 Pro-M 128MB. The fan mounts were of the correct type, but the holes didnt line up. Something was slightly off. Has anyone purchased a replacement fan for their video card? How did you pick which one was right?

I measured my fan on my video card and it was 45mm across..but the one I got was a little smaller? I'm kind of confused.