Onetwofifty
Member
This is awesome as I have the exact same bag for my Canon 7D and Lenses!
Here it is on ebay which is probably your best chance as Kata merged with Manfrotto a while back. The link has a picture with dimensions. Good luck!
KATA GREEN & BLACK MATERIAL MULTI POCKET CAMERA BAG W/ HARD SHELL | eBay
Here is the actual model I have:
KATA R-102 Medium Rucksake Backpack - Free Shipping!!!: Best Price in Malaysia