Rack for 9 A50+s?

I recently bought nine A50+s for a home I am building, and trying to figure out the best placement for them in my server rack/room.

I was thinking of maybe 3d printing a mini “rack” for them (stacked 3x3) like I have seen others do with raspberry pi’s.

Here’s a very simple example. (A50+s would be in their boxes)

Has anyone seen anything like this for the A50+? I haven’t been able to find any STLs online for this use case, so I might have to make my own.

I am open to other suggestions as well if there are other ideas for storing this many units.