Are you pretty handy? You could make a custom cage of any size/shape to fit your retic's needs. I build cages for most of my snakes. My burm hasn't outgrown his custom 3'x1.5'x2' yet, but I am preparing to build another. If you look in my gallery, I have a few photos of a 2'x2'x4' cage that I built a few weeks ago. It will permanently house my almost full-grown male Central American BCI (3' long). BTW, he is highly arboreal. Rarely goes on the ground, hence the dimensions of the cage.