I know a few guys that carry the same model you have, they all run raven holsters here is a link
[link] Great holsters and you can use them as OWB or IWB holsters they are modular. Oh here is the link for the light compatible holster
[link]I have the same issue with my Glock 24 when it comes to lights. It eats none LED lights like crazy, and even LED's have been killed by it. I have no idea why either, its is just a 40 Cal. But I guess its due the recoil impulse being different due the longer slide or something. But the Streamlight TRL is a great light and so far no issues with that one. My older none LED Streamlight M3 also seems to hold up to the abuse. But I think it survive due to it being so light weight