Need a new PCB board for Cary 303T Pro and don't know how to find it?

     Depending on the severity/extent of the damage; the traces of most PCBs can be bypassed and components replaced, by someone with the talent/experience.

      Of course: most of your CDP’s circuitry is surface mount, which makes things more tedious/difficult, but- still doable.

              On what board(s), did the damage occur (Power Supply/ DAC/Output)?

                                           Where are you located?

Very unfortunate, it may be time for a replacement