You might contact Victor at
Casita, in Rice Texas. I have purchased all sorts of items for my
Casita from him. Mine is a 2000 new-to-me Spirit Deluxe & came with a single 20# tank, held down with two simple but separate metal straps that hooked over the lip of the top of the tank, one on each side, and was affixed to the frame or tank holding angle iron with bolt and wing nut. An ingenious arrangement for sure. Tighten down two wing nuts to secure it and just loosen them to remove the tank. Needing more
propane but being frugal with
weight, I moved it over, drilling some new holds for the 20 pounder's new position, and added an 11 pounder beside it. For that tank, I fashioned two more straps similar to the ones on the 20, but just shorter for the shorter ll pound tank. It works great. The trick was to find a piece of metal and bend it slowly in a vise to fit. Go slowly. Drill out the hole for the bolt before you begin bending.