Custom Build of 3.3 with camera Trig logging

ArduPilot 3.4 can now log TRIG messages when it receives a fast sync signal from the camera hot shoe. I have a Pixhawk on a DJI S900 running latest release of AC 3.3 and since it is carrying a $15K IR camera I just cannot yet bring myself to run 3.4 beta with this feature.

Does anyone have a custom build of the latest version of 3.3 with this feature added? Within reason I would pay a Dev or make a similar donation if I could get some help with this. I understand it is a fairly simple change but I do not know my way around the code well enough to do this.