@WaymoreBlue
There's also: https://www.harborfreight.com/tubing-roller-99736.html
though I have some doubts on the quality.

@WaymoreBlue
https://www.baileigh.com/manual-roll-bender-r-m7
will handle even a little bigger but can't do complete circles.

@WaymoreBlue : There is a bigger hand powered roller bender that can handle slightly bigger than the bender:
https://www.baileigh.com/manual-roll-bender-r-m10
click on "read more" under "Specifications"