Noticed these guys selling Cbeam XL.. a thicker wall thickness version of Cbeam C-BeamXL Aluminum Extrusion 40x80mm - 1500mm Length
Perhaps someone at base will buy a piece and let us know. It will be interesting to see how they have accommodated the extra thickness without changing the overall dimensions. They do some nice stuff, and it looks real pretty, but it is sooo expensive to my mind!