Hi Dan,
My guess is that nothing else will work with them due to the fact that they were originally installed by Tyco/Johnson Controls who is notorious for everything being proprietary. I was just hoping that there was an outside chance that there was a magical compatibility list floating...
I'm not sure if this is the correct place for this question or not... I have 9 old (2012 ish) American Dynamics Illustra wall mounts that I would like to update with new cameras. Does any one know of a compatibility list?