Home Improvement

I had a skylight in a small barn I have on my property which had a branch go through one of the plastic bubble like skylights. I have been trying to find a replacement for it but can't find any that match.

It doesn't need to match the old one but everything I find is flat around the edges or pre-flashed. Anyone happen to know the name of what was previously on there where it has sides on it too?

Here is a picture of the skylight hole itself. The dimensions are
Inner - 21 inch 3/4 x 21 inch 3/4 Outer - 26 inch 1/8 x 26 inch 1/8

I found this after I posted, so I guess it is called Dome over Frame but can't seem to find any online.