[Elecraft] K3/KPA500/KAT500 - Band Decoder for Antenna Switching

[rich kennedy]

Hello, I currently have a K3 & KPA500, and, shortly I hope, a KAT500.  I have 3 antennas that I electronic switch with a DXEngineering RR8HP Remote Antenna Switch by manually selecting them on the DXEngineering Antenna Control Console.

I wish to have some kind of band decoder and electronic switch that can replace my manual Antenna Control Console so switch the K3, the KPA500, and the KAT500 all seamlessly. 

What are Elecraft users recommending?   Thanks, 73, Rich, K3VAT