Davidfor
thanks for your reply. I am now not 100% sure that simply ejecting the SD card corrupted the data base. It happened in the first few days I owned the Aura and I was doing a lot of fiddling including sideloading and deleting books.
Back to the topic, I saw this cover on ebay here:
http://www.ebay.com.au/itm/SMART-PU-..._qi=RTM1430839
And I also saw this cover here:
http://www.ebay.com.au/itm/SMART-PU-...item3386efad3d
Stephen