I was looking for a Tardis style hook to hang towels on and was surprised that I couldn't find one. I took the existing parametric Tardis from Gossamer and just made a hook base to slide the little Tardis onto. I used ABS but I would suppose that any material would work. The Tardis can be left to free spin on the base or you can certainly glue it once you get it screwed into place.

You may notice a slight difference between the mounted version and the actual STL file. I added an additional support across the bottom to help with printing and to give some added strength. Aesthetically it didn't seem to detract from it. My kids sure loved them anyway.

You will need to download and print the SMALL_TARDIS file from http://www.thingiverse.com/thing:13109 to go along with this base.