I was running around looking for something totally else when I can across this paper Tardis model. Thought some of you might be interested, in case no one ever posted it before?
http://web.mac.com/michaelhaggard/ALBIONRISING/Free_P.M..htmlIts a jpg file, a bit of measuring and scaling the image should net you a nice 28mm version of it. Construction is simple too due to the simple shape, should be doable for most people.