Found similar items but they did not hold as many as I would like, and it placed the mags to close together for my cheaper mags that i have. So I took to tinker cad and made my own. this is my 4th version that i designed that worked best for my use. If you are going to make one please bookmark this and show me how it came out.

FYI i ran this into Cura and flipped it and laid it flat, may make another one with feet.