edit: Better photos here.
I know, I know, my photography skills are less than stellar. Sorry!
Here it is before I felted it:
The finished product:
Inside front cover:
Inside back cover (more difficult, because there's an elastic strap there, used to hold it all together. I sewed up to the strap, then ended up using yarn to tie the rest into place. I didn't want a permanent cover, so at least it's reusable this way):