I'm looking for a specific cage that I have seen. The cage I saw had no identifying brand marks on it, but looking online it seems most like a Kings Cage ELT_2724 or SLT 2724 http://www.kingscages.com/ProductDetail ... SLT%202724, bit this one goes almost all the way down to the floor. The inside height dimension is 56". It doesn't take up much floor space, but because it has so much interior height it does seem big enough for a grey. There is a grey in it now, and it seems plenty big enough for her.
When I bought my GCC I put her in a cage that is about 32X32. I figured bigger was better. I never considered the possibility that I would want to put another cage in the same room. The 27x24 has the best chance of fitting where I need it to fit.
I could try to purchase the one at the rescue, but it is pretty old and starting to rust on the legs and around the casters. I figure it is about time to retire it.
I'd love to get a custom built stainless steel one, but I'd love to add a bird room on to the house, too. Neither one is likely with two kids in college.