After seeing these Iris brand pens on YT, I ordered one for Wendell. With the help of my neighbor, we have a configuration that is working out well, so thought I'd share it. It's comprised of 2 of the small Iris Plastic Pet Pens, and a 24 inch wire crate. It gives him plenty of room for his food, toys, and a wee wee pad tray and still has a private "den" to sleep in. I ended up with an extra panel, but by having two of the pens, it gives him a door at both ends.
Here is a link to the pen:
Amazon.com: IRIS Plastic Pet Pen CI-604: Pet...
and here is one to the wee wee pad tray:
Amazon.com: Floor Protection Tray Medium: Kitchen...