I use mine. There are actually several actual remote units. In fact, my ALTA board was replaced, so now I have two remotes. They are not identical. I believe (?) American Technologies was sold to someone. Not sure, but if not, they have them.
I've never replaced the batteries. What kind are they, that are so hard to find???
"Next to prayer, fishing is the most personal relationship of man" Herbert Hoover
"American by Birth, Southern by the Grace of God"Lewis Grizzard
2016 GMC Denali 3500Dually--2017 CC 36CKTS