there are many types and sizes bed.

have you looked at [url]Nest Bedding Coupon[/url]?
They have a vast collection of pet beds and accessories.
I am pretty sure you will also get one orthopedic bed for your dog.

I have a few of them on both Amazon and ebay. You should try checking out on both of the websites and find the exact specifications of such orthopedic dog bed that you're looking for. 

Amazon is most certainly going to be my best bet for where to purchase a good orthopedic dog bed. It's where I order for almost everything that's for my dog and they haven't disappointed me. 

I don't have any knowledge about such kind of dog beds but I'm very sure that you can find what you're looking for on Amazon. Practically everything is on Amazon.