How about a 3d printed Tardis pencil/pen cup? Or perhaps a set of Dr. Who logo drink coasters?

There are many DW items available for printing these days...check out my DW collection on Thingiverse.com
http://www.thingiverse.com/TTB_Studios/collections/dr-who/page:1

DW Logo Coaster
http://www.thingiverse.com/thing:371631

Tardis Light Switch Cover
http://www.thingiverse.com/thing:138180

Cheers!