Obsolete drivers for old hardware?

Hi folks.  I'm looking for the driver package for Solaris 2.x for the PCI-MXI-2 board.  I am trying to resurrect an old data acquisition system mainly for fun.  I can't seem to find those old drivers anywhere; can anyone point me in the right direction?

                                       Thanks,

                                        -Dave McGuire

                                         mcguire@neurotica.com