Well I feel pretty dumb right about now...Yet its available for far less from the source.
http://store.dji.com/product/phantom-3-hardshell-backpack-dji
There are several available on Amazon and eBay that are made for the P3.I have this one from amazon:
http://www.amazon.com/gp/product/B011J78GFI?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00
I had to carve out some of the foam insert to fit the P3 controller.
I love my GPC limited Edition backpack.
That's not a backpack on this value hobby page, it's a suit case. Nice case though.How about the backpacks provided by Valuehobby? they're all under $50, many choices for DJI phantom series quadcopters.
http://www.valuehobby.com/accessories/bags-cases.html
Still enjoying the DJI soft backpack. Fits in airline overhead and no questions asked in airports although loaded with virtually all items in flickr pics.
http://www.amazon.com/DJI-Original-...075406&sr=8-1&keywords=dji+backpack+phantom+3
Images of what all it holds on my flickr page:
https://www.flickr.com/photos/generaltoner/18814522012/in/photostream/
Fitting it all in the backpack in high speed: