Just wanted to throw this out there. The cheapest hides I have found were FREE!!
I went to my local garden supply place which is about 1/2 mile from the house and asked about used plastic plant pots. They had literally a mountain of them in the back of the lot. The owner said to take all of them I wanted.
I flip them upside down, cut them to the height I want, cut an oval door in them, and slightly melt all the edges with a soldering iron to get rid of sharp edges. They can be gotten in various diameters for larger or smaller sub-adults and the height is adjustable by you.
Anyone else use these instead of the (expensive) factory made ones?