Ah, I wouldn't recommend the Advanced module, since there's no threading between the inner heatsink and the outer shell - you're supposed to epoxy the two parts together after you assemble your LED.
The Dynamic heatsink, however, screws together and works fine in 1" hilts:
http://www.ledsupply.com/led-heatsinks/dynamic-led-heatsink-housing
The one-up design should work for single Crees/Rebels, but the channel might not fit all the wires for center-mount mult-die LEDs.
I've used the 3-up heatsinks before for Tri Crees. I've managed to squeeze (x4) 28-gauge wires through that center hole. Enough for a common positive and three negatives.
A note that the insert extends a fair amount past the rear of the heatsink, since these modules are meant to screw into another piece. The extra can be dremelled/sawed off, but the aluminum's hard and thick, so it's a lot of time and effort. I'd recommend a TCSS or Solo's Hold heatsink if space is a concern in your hilt. Saberforge sinks also work just fine, but they're currently not available separately.