As my car is currently in being repainted and refurbished, does anyone know where I can get the horns rebuilt?

Mine have always been fairly insipid, and nowhere near as good (loud and sharp) as the horns on Dad's 356 - which he had rebuilt 30 + years ago.

Or are they the same as the late 356 (12 volt) horns.

Assuming mine are too far gone to refresh, does anyone have any recommendations on replacements?

Justin