You could always add a wrap or something, maybe some leather. You could do a bit of that without damaging the hilt. The thinner parts around the flanged areas of the emitter look like they'd take wraps pretty well. You could also do some kind of cord to hang it. Assuming that since it's a trophy it won't have to be drawn, you could do something that affixes it to the belt more permanently than a Covertec or D-Ring.
Incidentally, I just want to say that having a lightsaber to carry around as a trophy is cool. Very Sithy. Have a DS point.
