WCIF airline crates for pets

I am looking to send 2 cats to England this July and wonder if anyone knows of where to find new or used crates suitable for airlines.

(…also, anyone heading that way? A pet escort would be deeply appreciated. These rescued cats have a chance at a real home with people who love them, but had to leave Taiwan before the rabies quarantine. The cats were in very bad condition when Animals Taiwan saved them - torn open tummy, dehydrated, and broken leg. Now beautiful and healthy. Just need a lift home.)

I know of a local vet that sells them, but apart from that, not sure. I need to get the contact detail of my GF though if it’s an option. He’s based near ren-ai circle

Thanks, I’d appreciate that.