I made mine
I started to respond this morning, but figured it could wait for me to take a photo while down at the boat today.When I bought my boat, the original emergency tiller was in the stern locker, rusted beyond use. I stumbled upon some commercial grade aluminum pipe/tubing used for fence posts. 20' long, 1-3/4" OD, 1-1/2" ID, very stout. I used the original as a guide. I located two trees with 18"-24" trunks only a few inches apart on my property, inserted the pipe between the two and pushed. It took all of my 200lbs and then some to gradually bend the pipe to the right angle. I then cut the excess off both ends. (More and a second photo following)