Is anyone aware of a good on-line gallery of free WMF files?

I'm actually in search of a very small triangle or similar shape, (preferably green or black, but I'll take any color I can get), one with a transparent background (so that all I see is the shape, as oppposed to the rectangle around it).

I actually had an ICO file that was very close to what I wanted, but couldn't get it to convert to WMF the way I wanted.

Thanks,
Kevin