I looked at these before. And this one
http://www.biopod.com/grand/ would work for most common Chameleons species, outside of like Mellers, Oustlets, and Parsons it would work.
For a Panther or a Veilied this would work great. However I considered these, look at the price tag and you will quickly change your mind lol.
I have done alot of research into this. So let me parrot alot of well known experts from what I have been told. Vertical cage height is a myth.
The reason the vertical cage height thing came about is the screen cages that were and are now marketed. You need a wide enough cage for the chameleon to move around horizontally. And chameleons need to be up high at eye level to feel safe.
When this "Rule" started the only suitable cages for chameleons was 24x24x48. So everyone said to buy that cage, due to the 24x24 not the 48, and to place it high so the height could help. Over years of this being repeated over and over, a game of telephone has skewed reality. You do not need a 48 inch tall cage, as a matter of fact a wider but not as tall cage is better in every way.
You can see this with a little searching. All of the Kammers cages, are 30 inches tall and 24 wide. They are one of the most repsected Panther breeders around. Dragonstrand makes and sells alot of The Atrium (use to be the only one, now it is the "Medium") It is in fact only 30 inches tall, that is fine as it is 30 inches wide which is what really matters. Hope this helps and doesn't ruffle too many feathers.
I do not say this out of nowhere. Do to my own cage height restrictions I study up on this. I PMed and had many chats in posts and PMs, with many reputable breeders and old school keepers. I researched old posts on this subject to get the true answer. As for myself, my entire chameleon room will have cages that are 30 tall, as from all the research I have found, what I said above is the facts, and I stand by them.
A great user here gave me a great piece of advice a while back. And made me realize I was doing something that really isnt a good idea. I was following the cult method and closing my mind to everything else. After hearing the harsh and needed advice, I have changed all my thoughts about chameleons. As I opened my brain to take in new info, and looked at Taboos in this hobby. To find that many of them are very far from truth. And in my opinion, a lot of the taboos, have reasons for existence that are far from what is parroted these days. Things have been skewed and changed so much that they hold no resemblance to there original reasoning.
In my personal journey, I went in parroting the same old thing. screen cage is a must, no substrate, 48 inch minimum for Panthers Veiled ect. I took this as I read it over and over, so I assumed it was best. Instead of doing the research and coming to a knowledgeable conclusion on my own.
I stand here today, getting my reptile room ready. And to see how drastic of a change was made after I opened my mind to new stuff. All my cages will now be 30 tall (aside from 2 male panthers, as I feel they need more Horizontal then I can provide, so I subbed them for vertical). They will be glass like, (not actually glass, but fully enclosed, like glass, with a vent). And they will have Bio Active substrate.
Sorry for the rant, I may or may not be a little buzzed

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And to the Aqua, if it was deeper than 15 inches I would call that workable, if it were maybe 17 inches. Kammers cages "The Forever Cage" are 24x17x30. You are losing 2 inches depth, however that isnt bad. You could keep a cham in there, it would be a tad crowded, but decent. A cacth however, if you do, do this. The basking spot still needs to be Eye level with you, so with the small cage you need a tall stand.
It has a LED UVB Diode! I'd love just to have that.
No such thing has been invented yet. Anyone that says different (them) is lying.