Ran a couple fruitless searches... I want to add a head light to my bike, and would like to get something that uses a standard H-4 bulb for obvious reasons. What aftermarket lights can you list that use the H4? Also, looking at some of the Acerbis units, they say the straps work on forks up to 50 mm, which is too small for inverted forks. Is there an adapter kit? Thanks all.