OS for GS

[Vaaance@webtv.net]

    Recently, a friend and I managed to find a GS in a Salvation Army
store for $5 (with manuals, drives, monitors, disks, and printer)!
After getting it home, I discovered that ALL of the ProDOS 16 boot disks
and programs are corrupted.  I've been using ProDOS 8, but would like to
use S16 files.  I can't run GSOS because I have ROM 00 (The Woz
signature edition).  Can anyone offer any suggestions or files that
could help?  Do any companies still offer ROM upgrades?  Any help would
be appreciated...
                               Thanks,
                                Darren V