by Clay Schaeffer » Sun Aug 25, 2019 9:50 am
Hi Mark,
I have had a few of those over the years (if we are thinking of the same type). The sides are rounded and rolled up from the bottom and top halves. To me they look like they were pressed in a mold. I would think you could mold them similar to molding fiberglass, and fiberglass might be an alternative material to use.