Having recently bought an Oasis2, I thought I would mention that I came across a 3rd party cover that uses a similar design to the official cover.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
The main difference from the official Oasis 2 cover (which Amazon withdrew from sale) is that it does not have the built in stand. It is also cheaper than the official one was (ranging from 19.99 to 27.99). I do not have the original cover to compare stability, and the reviews are mixed. There are one or two stating that it has a stronger magnetic connection and holds better; there are also a couple that say it falls off too easily. I personally like it so far and have not had any problems with mine falling off during normal use, and have not used the optional sticky take that it comes with it. Since this one has not been mentioned here, I just thought it might be helpful to anyone who was attracted to the design of the official cover and wanted a similar alternative.