I've been working on one for a little while now. I've put it on hold while I get a 4 foot Stargate built up to try to get it ready for DragonCon, but I'm tracking the K9 work here: http://home.comcast.net/~kerr345/K9/ProjectK9.htm
As to where in the States to score an RC K9, Forbidden Planet in NYC stocks much of the Dr Who stuff including the K9s but I don't know if they have any right now.
This play set will be for use with the 5" action figure range.
Featuring:
Motorised time column with pulsating lights.
Illuminated console with 6 control buttons.
Removable floor panels & flip-up console panel.
12 great sounds & light FX.
Assembles to over 60cm (24 inches)long.