Where can I get a GT1 interface? what is the cost?

I see alot that are the combo with the laptop, interface, software. But I want *JUST* the interface. Anyone?

A knock-off DK head cost approximately $2000. from chinese sources. New, original,
Siemens DK's are a rarity since manufacturing has already been discontinued. And they cost an arm and a leg plus more. Stolen DK's ocasionally pop up. But if it becomes defective, and the original owner has declared it stolen, the repair facility could turn you in.