Alpine 3555 Regulator

Trying to rebuild the regulator in this unit.

The zeners ZD558 and ZD559 - RD16ESB1 - does anyone know the value of these?

Also the transistors Q560 2SD2012 and Q561 2SB1375 has anyone had any history replacing these with a newer alternate?
 

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The Zeners are 16v.

The transistors are nothing special. This is a linear regulator. Virtually any transistors with equal or better specs will work. If a fully encapsulated case isn't needed, something like a 2n6488 should work. Add a clip-on heatsink if the board shows any signs of heat stress.