ive been looking this topic up for a couple days and u can buy something that(seems to me) be a military cold ignition smoke grenade at
For all of your tactical smoke grenade training needs!, they got fuse lit, pin pull ignition and electronic ignition(which you can supposedly make it remote control detonation), they also got a video that shows 1 going off.
hope this helps ya, cause i just found this place on google and signed up just to answer your question