Supportive Dog Couch

This is the best dog bed I've ever purchased. I'm almost 50 and have had dogs my entire life, for reference. My dogs LOVE it. It's thick and well-made, and they are on it all the time compared to previous beds. However, I just had to order a new one because after a few months, the support pillow part is hanging out because one of my dogs slowly chews through anything. This is not a quality problem - it is my determined dog. I went up a couple sizes on the reorder, as this was a tight fit for my 70-pound and 53-pound dog together, although they made it work by cuddling together. They will be much happier with the extra space on the new bed. I would love, love, love to keep the old bed and put it downstairs, but I need a replacement cover. Why aren't replacement covers offered? They would be good for situations like mine, but they would also make sense for people who want to keep a clean cover around at all times for when they need to wash one (dogs don't like to be without their favorite bed very long!). Please start making replacement covers! The bed is so nice that I didn't even knock a star off for this, but it would be a good seller, and I wouldn't be throwing away a great bed that can no longer be contained since my determined girl worked very hard at the corner and has the pillow hanging out about 2 feet. The first picture is from May (new) and the second picture is from a few days ago.