extended C with classes -- is this for sale yet?

[mullen at nrl-css]

From:  Preston Mullen <mullen at nrl-css>

A couple of articles about a C language implementation extended
with classes (much like Simula classes) have appeared recently.
The most recent is "Adding Classes to the C Language" by Bjarne
Stroustrup in Software -- Practice and Experience vol 13 No 2
February 1983.  An earlier article by the same author appeared
in ACM SIGPLAN notices January 1982.

In the more recent article, the author (with Bell Labs in
Murray Hill) says that the additions to the language have
been implemented and are "now in use at close to a hundred
installations".

My question is, what installations?  Is a compiler for this
"extended C" part of any commercial Unix release?  Can it be
purchased separately?  Is there any chance of it appearing
in some future 4.Nbsd?

P.S.  It looks pretty nifty to me.