5 seater sofa protector where?

My mother has a corner sofa 2 seater a curved corner and 2 seater again not an L shaped one so five seater.
she is trying to get a cover for all of sofa to protect it from her cats.
she ordered one from Amazon and it was for recliner so no good and had to send back. I found one more suited but they needed to check sizes to see if fits. But the Amazon seller has nothing left of any stock like he was removed from them. Nobody just runs  out of stock all all colours a few days after.
just curious if anyone has similar sofa type and if using one where they got it from. Thanks