I don't believe in screen protectors. Not needed.
For covers I would look at amazon or ebay (be shure it is for the aura, since searching for aura also brings up results for the hd and h20. Leather or fake leather is a matter of taste and price. I would recommend a slim fit cover. They are light and have exactly the size of the device. Nothing cluttering the bezel too. I have a cheap 10 euro cover and it does its job
I think there is a threat somewhere here with more on covers.