I found the brackets on Ebay searching for "LSL headlight bracket". They are made by HighSider, which I think is out of Germany. After ordering everything up I found out the GSXR forks I installed have a necked down area between the top and bottom triple right where the brackets mount up. I tracked down a HighSider dealer in the UK to order the new sized clamps. This is their listing for the whole setup:
http://bikermart.co.uk/proddetail.asp?prod=220-654-58-68 It doesn't look like they have a listing for just the brackets, but I know from experience they can order specific parts from HighSider.
Even though this setup is significantly lighter than the stock set-up, it didn't feel very confident with just those two mounting points, so I ordered up a bottom bracket that locked everything into place, and also allowed me to adjust the light's pitch. It was originally built for a guy on another monster forum that was mounting up an LED light housing and ended up working perfectly for me.
http://shop.crimescenechoppers.com/115MM-Headlight-Mount-CSC-933-CSC-933.htm