Here is a thought - why not go DIY. That way you can custom build the cage to your personal specs, without having to pay more than you need to and still have to wait for several months to get the cage. Often times a DIY cage will save about $150 or more on a 6' long PVC or melamine cage, when compared with some well known cage manufactures.

If fact this is the option I am seriously considering myself for my super dwarf retics, and boas when they get large enough.