Just a suggestion if you can't find another cover...
I don't use the cover, I find it awkward*. Instead I bought a $10 7" netbook sleeve at Target and sewed it up a little off center to fit the 505. The other side of the sewed up sleeve creates a pocket to store the USB cable or AC adapter. It's especially handy when I travel.
*Sorry, I can't sell the because eventually I'll sell my 505 when a better model comes out and the lack of the cover might not get me the best price.
|