I used
http://www.inkscape.org. Pretty nice program and free too!
I'll try and attach a larger version of the image to this post. Hope it's OK, this is the largest I could make it while still keeping the quality reasonable and getting it in under the 128k limit for attachments..
The original vector drawing is in svg which I guess is a pretty obscure format. If you still have a need for it, pm me.
edit: Weird... seems like it worked, but SMF reports the image as much lower resolution than it is. If you download it it should be 1095x1600.
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