Going back a few years.... I made mine with a push fit elbow and some cut down carbon golf clubs from a charity shop. The shafts were pretty good but tapered. I've also used sections of cheap carbon walking poles. If using pole handles down... A length of line between the handles can stop them trying to spread, or a peg through the handle loops.
Recently, I used tips up into the lid of a deodorant bottle with a clove hitch...
I used two poles lashed together for one side and a barebones carbon pole for the other.
Theres numerous ways to redneck an A-frame.