It depends on which led light you have. What kind of emitter is it? It should be either a rebel80 or a luxeon3(I think). I suppose you could swap it for a rebel100 or a ssc P4? I'm not sure the malkoff will work with the LED lights. Does it have the same plastic bulb tower setup as the incandescents?
do mag leds built the same way as incand?? cuz reflector looks deeper, i'm pretty sure cam is different too, not sure if any led retrofit for incand. mag would work with magled. but i might be wrong thou.
your best bet would be calling maglite and see if they can send you spare led.