Thought about it, sure they look cool and handy, but Jeez...... too darn expensive!!!
I was gonna try to "adapt" something, a couple of small rallye lights or so...
The twin-reflector Touratech lamp is not much better than the early F650GS in terms of lighting performance.
If you have an early single-spark F650GS you can adapt the later twin-spark F650GS headlamp into it, and having owned both I can assure you the later version is "much" better.
Here's the link below, to the thread on the Chain Gang forums describing how the conversion was done.