I'm a big fan of the Pop Vinyl series of bobblehead figures from Funko, Inc. They've made literally hundreds of them so far, from just about every possible license.
Give his pants & tie a new coat of paint and maybe add an arched eyebrow above the left eye, and you'd have a decent David Tennant.
Somebody get busy on that and send me one, would you? My duties as CEO of Bob Canada's BlogWorld take up all my spare time.