Thanks Sunman. Yes not great options. I have thought of molding a clamshell for the tigger guard out of JB Weld, that will hold a light. There are some incredibly powerful keychain lights that are very small.Not very good options.
https://www.amazon.com/Mako-Univers...istol+rail&dpPl=1&dpID=41ygViI4zkL&ref=plSrch
NcStar LED Trigger-Mounted Universal Pistol Flashlight
https://www.amazon.com/Recover-Tact...rail+glock&dpPl=1&dpID=316MNHMfGCL&ref=plSrch
The last link is not available for the pps but might be worth reaching out to the company to show interest as it looks like the best option.