I just logged back in after doing an internet search. Ron beat me to it, but Bus Depot offers the hard cover edition for $77.95. Bentley sells it for $119.95 The hard cover features more content than the original paperback and it holds up better.
A search for a used version yielded prices in the $80 - $90 range for the paperback. One joker is asking $195!
Steve'87 Syncro 

    On Monday, October 9, 2017 12:13 PM, Eric Caron <ecaron1@COMCAST.NET> wrote:
 

 Hi List foks,

        I have a 85 Bentley but once I get my van back from Denis some systems will be of the 86 to 91 variety. 

does anyone have a extra Bentley available or idea for where to get one? Used is fine.

        I suspect over time the later book will match my van more and more. 

Plus, a few times I’ve lent out my Bentley to folks at gatherings only to have it returned quickly as they had a younger van with different systems.  It would be good to have a version with all the years.

Thanks,

Eric Caron 
85 Vanagon anticipating some nice updates.