Here is the answer I needed thanks to Virgil Elliott in another post at:
http://forum.portraitartist.com/show...id=887#post887
Virgil shared the following information (edited for brevity - but you can see his original posting for the complete text)....
MuseuM Services Corporation, in Minnesota, makes honeycomb aluminum panels. They are light in weight, thus suitable for large paintings. The same company also sells various types of panels with canvas glued to them with a conservation adhesive, ready to be primed. MuseuM Services Corporation has a website at:
http://www.museumservicescorporation.com.
Sometimes Virgil glues his canvas to John Annesley