If you are interested you can build your own. It requires glass or plexiglass and aquarium glue.
Get the glass from a local glass shop, put it together, tape it tightly & run a good bead of glue on the inside of each seam. Let it dry completely.
Tell the glass shop that it is for a terrarium rather than an aquarium so that you can get appropriate thickness.
Either buy or build a top with wood frame and metal screening with appropriate size openings.
We have built and filled 200 gal aquariums this way with no problems.

John