I believe the poster above was wanting to replace the whole headlight assembly with the one from mexico, as it has halogen projectors and led DRL's, similar to the new sonic.
Like you said, replacing the bulbs with led's in the basic headlight assembly is trivial. The hardest part for me was fitting my hand in between the airbox and the bulb to remove it. lol
I think just wiring the upgraded headlight assembly's led DRL circuit to a switched ignition circuit should make them work the same as the mexico spark, and the projector uses the same bulb type as the reflector, s