I can send you an image of 3.1 .
However, I've made few modifications (installed few hacks, disabled auto-update,...).
I can also send you a zip file containing necessary user store contents needed by some of the installed hacks.
Next time consider installing Yifanlu's custom kernel, that is able to export rootfs partition from recovery menu.
EDIT: I have Kindle 3G, don't know if that makes the firmware any different.
Last edited by dsmid; 10-26-2011 at 02:33 AM.