We have an Elk M1 Gold security system and need to add an expansion panel for a new wireless smoke detector, wireless Co2 detector, and 3 key fobs to alarm even when windows are open (screens are secured). We’ve tried to go through Elk dealers and no one has called us back. The company who installed is very confused about the expansion panel so I’m looking for alternatives. Of course, I’m willing to pay. Zip code 94025.