"That's the type of back case I'm looking for but that one is for the iPad 2. I don't see an option for that case and an iPad 3 anywhere on their site."
----------------------------------------------------------------------------------------
On their site it does state that its compatible with the New iPad:
"SPIGEN SGP The new iPad / iPad 2 Hard Case Harmonie Series"
SPIGEN SGP Harmonie Slim Fit Case carefully designed and constructed with durable and harmless polycarbonate material for The new iPad and iPad 2. The Harmonie case is designed to complement the Apple Smart Cover and comes in a variety of colors. This snap on case highlights the design of the iPad's thin form and features an Apple logo cutout on the back of the case.