It is not from PAB. That was just an example to show that there are also legit
ways to get unreleased lego parts.
I bought the part from bricklink my self in 2014.
Which parts have been on a PAB wall that have not been released? The BAM minifig
parts get catalogued and I cannot remember any examples of parts from PAB walls
that have never been released. Even if there were other legitimate routes for
other unreleased parts, it doesn’t mean all unreleased parts should be allowed
here.
I believe a lot of Warm Yellowish Orange parts were recently released at the
Florida LEGOLAND PAB? They definitely were never released in anything else, and
they were most likely old product from the model shop that had been sitting around
for almost 20 years. There have been lots of legitimate ways over the course
of LEGO history to obtain many rare and unique items.