Guys, I know absolutely no more than any of you about upcoming releases from SF.
That said, here are my opinions:
I believe we can see another Lx in the next few months. Again, I have absolutely no basis whatsoever for that figure, its just my belief.
Second, I am quite sure that, when they do come out, SF will release entire new lights, not just the bezel. Chevy doesn't release new front ends alone, do they? No, they sell the whole car.
SF seems to have been doing the same thing, at least starting with the L4.
I also believe that, yes, they will offer the bezels separately (as they are now doing with the KL4) but it will probably NOT be cheaper than buying the entire light. (Unless, of course, you already had the host body to begin with.) Example; Kakster, you'd likely save more money selling your M2 and buying the entire L5/6 when they come out. Unless you want both heads, of course.
Just my opinions.
Anxiously awaiting the L6!!!
Drjones