If you get some made pm me before you do! And I'll tell you how I had mine made! I put drains in mine to made from 3/8 copper tubing, flared & soldered in to the bottom of the pan and tubing down to a catch pan on the floor!
I just called them & I talked to the guy who does the sheet metal duct work for furnace's & made a drawing for him with measurements & he made them! I think I paid $17.00 a piece for them & can set 2 Cages on each tray!
I had mine made at a heating& cooling business out of light weight galvanized metal, pretty cheap! Bent up, corners tig welded! Then I smeared silicone in the corners so they don't leak!
Try lightly feeling in front of her back legs on her belly, if she is carrying eggs you'll feel what feels like jelly beans in her belly! Use your thumb & index finger to lightly feel for eggs! Gently!