Replacement volume potentiometer Denon Integrated Amplifier PMA 1055R

Replacement volume potentiometer Denon Integrated Amplifier PMA 1055R

I'm not sure I believe the local repair shop (I'm in rural Tasmania) who've told me a replacement volume potentiometer for my Denon PMA 1055R is no longer available. Importers of audio gear into Australia change brands on a frequent basis and are often unwilling to stock spare parts for models they didn't import themselves. Emails to Denon in Japan asking about this have not been answered. What is my next move?

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