Have you considered any indoor cage? or make your own?
These indoor cages are great... but do not buy ones with high shelves or mesh bottoms.
This is my home made cage...

The sows live on the top level and boars on the bottom
To get the supplies all you need is these grids from B&Q...
Mesh Cube Storage System Silver Effect, 9840
and some Correx from either a Sign Shop or any hardwear shop you can also use Lino too.
The cage you make a very large cage 5 grids long by 2 grids wide would be 14 grids with a couple spare, you dont have to make a top or bottom, a top would be dog/cat proof. I used both the connectors and cable ties to put mine together.
Emma x