Hi again: here is an update on my attempts to find a front FSTN polarizing film
I have ordered this FSTN polarizer film.
The issue is....
From polarization.com:
Yes, an FSTN display needs a clear retarder between the top polarizer
and the LCD to covert the elliptical polarization coming out of the
display back to linear polarization.
Unfortunately, there is not just
one kind of FSTN: there are many
variations needing different retardation and orientations. That is one
reason we do not offer them, because the market for a specific one would
be too small.
There are some that use circular polarizers, what means that they have a
quarter-waver retarder at 45 degrees to the polarizer (for example we
have seen BMW navigation systems with a right-circular polarizer). But
the most common types need some type of elliptical polarizer.
To solve that, I also found this site that sells different retardation films,
http://www.polarizerfilm.com/fstn-polarizer.html...but I'll wait for the above polarizer to turn up before making further orders.