Baby gate (Lexden CO3)

Hello Everyone. I need your help please. I am looking for a couple of baby gates that are pressure fitted with a door that opens, maybe even an extendable one? Our son has just returned home to live with us and he has brought his dog with him. Unfortunately one of our two rescue dogs we got last year is reactive to our son and doesn't get on with his dog. At the moment we have 2 old wooden frames with wire mesh, not ideal but you have to make the best out of what you already have. Thanking you in anticipation. Bev