Well since you also asked in a thread the same question you asked in the PM you sent me I answer here.
Yes, I do have quite a collection of files, however I don't think I have a stock nandroid backup. I do have some of the stock OTA files that can be flashed via recovery. Check the links in my sig, and mainly my guides, I have several that might be of use to you.
The nice thing about the A855 is that it is almost unbrickable. The only way it becomes totalled is if you dro9p it in water or the hardware actually fails. The only other case is if it gets unplugged while flashing a .sbf file with RSD Lite, but that _might_ still be fixed by trying it again.
good luck