Never heard of one. What are they like...wait, I'll just Googlizem.
Looks way too small and way too uncomfortable to me. Wait, let me add, way too unstable. Also, no way to mount a T-motor, ergo, way too labor intensive.
In other words, I would not be interested but if I was 23.6 years old, I might.
I believe I'd wait and watch for a used jon-boat and get stability, T-motor mount, more room, more comfort for the same money.
As an aside, in 1975, I bought a 14' Terry john-boat, brand new with a used 9.8 Merc motor and gas can for a total $725. I still have the motor and it is still running. I figure it is at least 40-years old. I gave the boat away years ago. I think it cost $300, new.
This is the boat and my late friend Mickey Pope with a couple Smith Fork smallmouth in 1978.