Hiya Triturus, Bayer/perlon is still available but its been repackaged since you last bought some, its now on a bigger diameter spool under the name of Kamasan bayer/perlon, still the same line and B/S.
the stuff you see on the markets is the old spool and as Splodger says dont bother with it cos the new spooling has been out for around for about 3 years, so that gives you some idea how old it could be.
by the way Kamasan/bayer is still a good line to put on your reels, and use the high tech stuff for hook links.
teepee.