I just bought and installed one last night. Got it from the stealer's on hand stock...
Pathblazer by Kisan Technologies.
Right at $100.
Plug and play, three prong for the H-4 bulb.
Hardest part was figuring out where to put the sensor...might still move it, but there are a couple of adjustment holes in the R's headlight cover. I used one of these to fish the sensor's wire through, then wrapped it behind the headlight, snaked it up the clutch cable, and zip tied it there. Might move it eventually.
Anyway, the thing was a snap, unplug connector, plug this thing in...very easy, and works great.
The book that comes with it explains how the modulater IS legal...I've only had it on a day or two, but it really does look like an emergency vehicle's wig wag lights, I can see where that could be confusing for some.
Hope this helps, if you absolutely need pics, let me know, I'll do some after work.
Bubba