In general, LG doesn't ever release the first version of its firmware for any drive as a download. That generally only ships with the earliest releases of the drives. Also, I don't believe there is any way to retrieve the firmware from an LG writer (although I may be wrong about this for Panasonic chipset LG writers, which is what your drive is). So there isn't a way to flash back to 1.00.
There are other options you can try, such as cross flashing to a 2166D, but I am not sure these are good ideas. I don't have your drive so I cannot speak from personal experience. Perhaps someone else who has your drive can help you with that. Good luck.