Besides watches (Retrograde and Retrotwin), Paul Gerber also makes deskclocks with tourbillon. His site tells us :

The flying minute Tourbillon is housed in an attractive precious stone casing, which enhances the beauty and elegance of the transparent Tourbillon mechanism.

This must be something for the guy who has everything. šŸ™‚ Unfortunately there is no price mentioned, only a few lines of introduction and the specs of this clock.

Photo from the Paul Gerber website