I made one out of something like this
https://rover.ebay.com/rover/0/0/0?m...2F312341709318
I popped the polycarbonate panels out of the top and staple gunned some mesh panels from screwfix
https://www.screwfix.com/p/apollo-13...-10-pack/31202 made a base out of a polycarbonate sheet screwed onto it as the ground has a tendency to get a bit boggy and didn’t want rats digging under into it