I just made a small case from a DVD box for the reader.
All it took was leveling (cutting) some plastic inside the reader's box, and glue a piece of a towel on the inside.
I have to admit I have quite a nice looking case, however I don't think the case offers more protection than the leather pouch delivered with the reader.
For small falls and bumps,yes;but it is not protecting the screen better than the pouch.
Anything pressing too hard on the center of the box will break the screen.
I'll post pictures in the "Make Your Own Polycarbonate Case" thread at
https://www.mobileread.com/forums/showthread.php?t=11420