Cubase SX

I have revived my G4 QuickSilver Power Mac and also found my purchased Cubase SX1 software ( original installer ) as well as some updates. However, much to my chagrin, the CD updates for are not loading on my PowerMac’s desktop because it appears that the CD surface look scratched. I have tried to clean up those CD’s with the updates but no luck.

Is there a “legacy” Cubase SX download site for the updates or where do i get the updates ?