Does an IR filter even work with an LED? In theory the F03 from Surefire should fit the L1 or HDS lights without modification, but I don't know if LEDs put out enough (if any) IR wavelength light for the filter to be useful. Perhaps someome more knowledgable can fill in this blank.
In any case, I do know the F0* series beamshapers/filters will fit the L1 and HDS lights (1" bezel diameter).