When I replaced mine. I made my own. The original was about fifteen feet, maybe a little more. I tapered and beveled the edges of basswood. It is about eight feet now. I made it octagonal and sanded it round. Really not a huge task making or finishing it. Basswood is fairly soft and easy to work. It is about three inches across at the top, about six at the bottom.
When I had it looking pretty round I set the mast at about a 45 degree incline. I mixed up a batch of fiberglass resin and poured it in one end and caught it at the other end.I kept pouring it through until it had pretty well set. Of course it leaked out where my joints were not perfect but that was part of my goal with the glass.
The tricky part was hinging it in the middle so I could lower it easily. I didn't end up hinging it but put a butt end splice in it to lower it down. The wires enter the bottom, come out at the splice and re enter above the joint. If I were to do it over I would spend a little more time making the hinge and figure out a way to make the wires stay inside, just have to be longer, I guess.
I finished it off with Interlux Brightside. I am very happy with the look. BTW, I have not lowered it since I installed it, about three years.
Sometimes I miss the boom but I never miss all the "guy" wires stabilizing it.
pete