The first GQF I purchased was in a complete pile. It had sat out in the weather for a long time and literally disintegrated as I took it out of the truck. I am not much of a craftsman, but I was able to take the dimensions as it fell apart and built another one very close to their's. It is not very complex. I did call the plant at that time to ask a couple questions about putting a hatcher in the bottom and he snapped at me informing me he was not going to design an incubator for me. I found a 1202 a few weeks ago cheap cheap cheap and bought it. It works OK but I just hate doing business with folks who dont find it necessary to be nice.
I think the Dickey is virtually the same design,but a real real nice guy.
Oh I am sure those turner motors etc can be had in bulk for pretty darn good prices.