Pet crate, or indoor pet enclosure (Hanwell surrounding areas)

I’m currently fostering two young kittens and need a temporary enclosed space to keep them safe while they wait for their new home. I’m looking for a large dog crate, puppy playpen, or any enclosed pen with a roof suitable for containing two small kittens. This is just to keep them secure in a spare room and separate from my resident cats. If you have something you no longer need, I’d be very grateful. I can collect at your convenience.