Here are the AOSP JB 4.1 wallpapers-just thought I would upload them as our device also runs on JB. They are in a .zip file and are resized to HDPI resolution. Feel free to use and share them as you wish.
Download link: https://drive.google.com/file/d/0B_1...it?usp=sharing
To download click on link then press Ctrl + S, or File>Download.