I was looking for a case and keyboard for my Nexus 10 and saw this on Catch of the Day:
Kensington KeyFolio Pro 2 Keyboard Case for Samsung Galaxy Tab.
Despite it saying its for a Samsung Galaxy Tab I believe it is the universal design and can fit multiple 10 inch tablets. You can see more information on Amazon.com and its cost of $53.49 excluding shipping.
http://www.amazon.com/Kensington-KeyFolio-Universal-Removabl…
I think you are taking a risk. First picture looks like universal, the third picture is not of the universal version.