PS3 unscrub?

Posted by jimmy on .

I'd like to get back to the original redump image from the JB directory. I know how to encrypt using the key, however JB directory doesn't store the encryption map or filesystem/layout which is a problem (even if the filesystem layout is standard and could be brute-forced the encryption map can't be in reasonable time). Is there an nkit-like tool that can go from JB to original image?