It's not ideal, but I bought this sleeve to put the Oasis 2 in, with the cover still attached. It has very little padding (which disappointed me), but it's thick materials. The reader and cover are a snug fit. It's fairly inexpensive and gives you another option if you like the original cover but don't want it to get nicked up in travel or while being moved around your home.
Oops, forgot the link:
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1