On the M-Edge site, the Executive Jacket covers appear to be available for purchase. Price is $19.99 and is said to ship in 1-3 days.
http://www.medgestore.com/products/dr800-executive.psp
The price seems to be half of similar covers for other devices. For example, the Sony Daily Edition Executive Jacket covers are the same three Leather colors but go for $39.99.
I see no update in the screenshots to show better access to the power switch...