I don't pretend to understand what a fluctlight really is, but it seems that since it can be transferred into a computing environment, it could possibly be created.
I was also thinking possibly the old data from dead people that might have been stored in NerveGear, AmuSphere, or Medicuboid could be used to bootstrap a new fluctlight. Even in the SAO world, there doesn't appear to be the technology to insert a fluctlight into a body (but I haven't read enough, so maybe there is?), but if you could create a fluctlight then someone could be semi-reincarnated inside a virtual world...
Does this make any sense?