This is an easy Whirlpool freezer basket holder replacement.

It has a slightly larger hook than the standard model because the default one sometimes slipped of the railing. (The 3D-printed one is in purple.)

Also, there seems to be quite a lot of different baskets out there. My holder fits baskets that have holders with approximately 50 mm between the holes. You should be able to measure it in most 3D software, so you can be sure that it fits yours :)

You could print it either standing or lying down. Both will have their strengths and weaknesses, but I think standing is better for it's use case.