There is one electronic version I found. (http://www.futureautomation.co.uk/Product/Details/EAD) but i wasn't able to get a price on it. I'm sure its at least $600-700 +. Hope that helps..
Got a quote of 2400 for this one... Way too expensive.
I also had an e-mail thead with folks from MantelMount. They estimate that an electrical version of their solution would add ~200.00 in the actual price, but they don't any short term plans to offer it since they can't keep up with the demand of the mechanical version yet.