Hi, Holly.
Can't help you find the guy, but it's probably pretty easy to go back to stock. A few years ago I put an LED in my KLR headlight, and it was a simple as replacing the H4 bulb with the LED unit and plugging the LED pigtail into the Hr4 socket in the stock wiring harness.
FWIW, the LED put out a lot of light, but the beam pattern was lousy, and it failed after a few weeks of use. The guy who sold it to me sent a replacement, which is still sitting on a shelf in my garage.
Frank