Jeff Higginbotham was nice enough to put the Adobe Illustrator file on the downloads page...I recommend using this file for all printed items. It can be scaled to any size without any loss of resolution.
I have no idea what to do with these unstuffed files. I use Illustrator on a PC and it doesn't know what to do with them either. One file has no extension and the other seems to be some sort of raster source. Can someone give me a hand?