Pet Gear Travel Lite Octagon Soft-Sided Pet Pen with Removable Top - Crates, Carriers & Kennels - Dog - PetSmart
Other places sell these also.
These are soft sided and also have a bottom and top.
Just another idea. If he is potty pad trained you may be able to give him the run of your bedroom during the day. I have foam stairs next to my bed to she can get up on the bed during the day and she uses the potty pads, has water and toys.