I haven't come across any but I'd check ebay, Craig's list, luggage.com, department stores that carry luggage as you never know what they may get in. Samsonite, American Tourister, London Fog, are all good companies that sell luggage and have sites.
Yes, you can bring an unopened iPad on a plane in your carry-on luggage.
ipad cases
The best iPad cases i've seen are OtterBox cases and Pelican i1075 Cases.
1234 (just like my luggage)
There have been documented cases of the new iPad overheating, but only slightly more than cases of the iPad 2 and iPad 1. It is not a persistant issue.
Your iPad came with a usb cord that attaches to your iPad with the big end and the other end (the one with the usb plug in) goes into your usb slot on your computer.
No iPad 2 comes in white and black but there are pink cases for the iPad 2.
IPad leather cases can be found at many retailers online and in store. Retailers by Best Buy or Fry's Electronics probably carry leather iPad cases as well as the Apple store.
Most cases, except for the hard clamshell type snap-cases will fit both the 2 gen and 3 gen iPad.
Speck Products make a variety of cases. They make cases for the iPhone, iPad, iPad mini, iPod, Tablets, smartphones. They also make cases for Laptops.
You can buy leather cases for an iPad online from the Sensa Cases or Zazzle. You can also purchase this item from retailers such as Overstock and Amazon.
Here's a link to a website that offers many different varieties of iPad travel bags. Hope you find one you like! http://www.borsabella.com/computer-bags/ipad-travel-bags