Wayne,
The MCD's I ordered direct from MCD (
http://www.modelcontrol.com). I have ordered Vantech controllers directly from Vantech (
http://www.vantec.com) and Harbor Models (
http://www.harbormodels.com), and the Mtroniks, I pick up at the local Hobby People store, but they do sell them on line at
http://www.hobbypeople.net
Mike