The URT-23 amp I am restoring has some corrosion issues - the button connector from the driver output transformer assembly to the final grids has lost its silver plating - see

The remaining silver plating was just held on by a spider web and has since fallen off.

Just for reference, this button contacts the three spring fingers just to the left of the switch coupling in this photo

Does anyone have a junker driver output assembly (1A1A4) or this part?

Or helpful advice? Should I just clean, De-Oxit, and pray?