When I wasn’t able to find seat post struts I decided to see what I had laying around and came up with this. I found a piece of 3/4” aluminum tubing and was able to bend it with my 1/2” EMT bender then used a -12 AN hose separator to attach it with. I had to grind away some of the inside of the hose clamp in order for it to clamp down tight enough. Also I squeezed the tubing under the seat with my vice and aluminum jaws