Since I wasn't fast enough to order the official, hand blown glass, TARDIS Xmas Tree ornament from the BBC America shop, I decided to head down to my local hackerspace and make one or two on the laser cutter.
This started off as the "TARDIS Coloring" image by "Violet Succubus" on DeviantArt (http://fav.me/d310mxy). It was the cleanest, nicest, B&W line drawing of the TARDIS from head-on I could find.
There was much fiddling, adding to, filtering and re-drawing by myself and two guys (both named "Matt") at my hackerspace, but many of those lines are still hers and for them I thank her. I don't think it would have come out as nice as it did without such a solid place to start from.
PS - Yes, I know. The windows are wrong. I'll get to it, but until then I'm calling this version done. :D