InkBlue,
I mounted one to my A5 flatline battleshroud.
A little dremelling and some effort has it solidly mounted and works well. If you're still "shopping" I have footage from this camera. I also have a different style helmet cam that may give you some idea of what to look for. PM and I'll send you links to video files.
I later used video software to put the gun-cam as "picture-in-picture". (the screen shot is compressed but you get the idea)
I'll be glad to help with any info you might need.
WinterKill