122GHz for Amateur Radio
Here are 122GHz dishs, feed, and sub reflectors that can be 3D printed and metallized (or machined).
The hyperbolic solid sub reflector is also at https://www.thingiverse.com/thing:2750924
The parabolic dish is also at https://www.thingiverse.com/thing:2751650
The design presented at Microwave Update 2018 is in the MUD_2018_demo folder.