I think it is unlikely that this would be possible right now. The complexity of the driver and how it interplays with the hardware makes this really difficult. However wondering why you would need this as they are pretty good and free?
what do you mean? most of those decompile projects were not even close the original software; for a driver, this would be completely different. i do believe there is some open-source drivers that are just not that good.
Isn't it the lock in to NVIDIA that worries people?