Recently a friend of mine in Calgary (Canada) fell heir to a 13Kg box
of Solaris manuals.  He says that they are still in their original
plastic wrappers and that most of them have "5.1" and "x86" on the
spines.  There are a few which appear to relate to Solaris 2.5.1 for
Sparc.
If anyone is interested please get in touch with him directly:  rick at 
hartmantech.com
Bob Bramwell            |  The birds have vanished into the sky,
                        |  and now the last cloud drains away.
+1 902 531 2289         |  We sit together, the mountain and I,
                        |  until only the mountain remains.
                        |               - Li Po, 8th Century Chinese poet