WER sells a headlight "relocation" mounting kit for the KDX. All it really comes with are some straps. You flip the upper mounting brackets to raise the headlight assembly up about an 1", and since the lower brackets won't reach the holes in the lower triple clamp, the rubber straps are used to secure the lower portion of the headlight to the fork tubes. You could easily mock up something similar, or use ChuckyBoy's method of rubber coated conduit straps to mount the assembly.
Do a search on WER in this forum, and you'll find plenty of detailed info. For pics, check this out:
http://community.webshots.com/album/58122940nvvMgT
Oh ya, most of us still end up cutting away a lower portion of the headlight assembly with a fine-toothed hacksaw blade to allow clearance of the actuating arm. Also ensure that the steering stops are in full contact, and that the WER doesn't "lock" before the steering stop hits.