PlayStation 3 ISO Rebuilder tools use Inno Setup Dependency (IRD) files to verify game dumps.
: Groups dedicated to PS3 preservation or modding (like the RPCS3 or PSX-Place communities) often have "EBOOT exchanges" or archives for users who accidentally overwrote their originals.
Several PS3 homebrew communities maintain databases of original EBOOT files. Websites like PSNDL or dedicated forums often have sections to download official pkg updates, which contain the original files.