You might want to investigate buying professional art panels. There are a couple of options out there. The best artist display panels, IMO, are Pro Panels -
http://www.propanels.com/
I have panels that are an aluminum mesh - not as nice as the others, but they are light and they break into two pieces each allowing me to pack them into a car trunk with the seat folded down.
Mine are available from Graphic Display Systems:
Here is their contact info and a pic of the panels:
Graphic Display Systems
308 S.1st St.
Lebanon, PA. 17042-5427
1-800-848-3020
717-274-3954
FAX 717-274-2710