I did it few months ago with SSC USWOH.
Problem is the poor heatsinking. There is no heat path from LED to body.
So, I used stock circuit (about 130mA to the LED) and small round aluminum heatsink.
Here is a disassembled Molle
Yes, this is exactly what I'm waiting for, a mod for the new molle light. If only the PL molle light would come out with more light output I would surely buy a couple.