My guys have made them in the shop. 1.5" 40S alum pipe, with 2" T alum t beam.
I might look for some of this. Not sure where to get it. At lunch I went to Lowes and they have 2 inch, 10 foot poplar rounds that were rigid enough. Just seems that 10 is a few feet too short. The aluminum tubing is interesting.
Anyone here from around Lafayette and have the capability to weld aluminum pipe?