This is a fairly new brand, but they have a huge back case product line for the new iPad. They have soft case, hard shell case, case that is in solid color, and case that is translucent so you can show the Apple logo and the engraving.
The cases are available on Amazon
The price is just $15.99 - $19.99, and if you buy two of those, you get 20% off.
Hard Shell: Amazon.com: KaysCase Smart Solution Hard Shell Smart Cover Compatible Back Cover Case for Apple iPad 3 3rd Generation - The New iPad (Clear): Computers & Accessories
Soft Gel: Amazon.com: KaysCase Smart Solution Soft Gel Smart Cover Compatible Back Cover Case for Apple iPad 3 - the new iPad (Black): Computers & Accessories