RSP-1068 Rotel Encoder Volume Control

Hi. I sent a request twice to Rotel for the encoder but they have not replied.
Have any of you replaced this volume control in this Rotel Processor or had any luck finding a generic replacement from Mouser or Digikey ( any supplier)?

This is from the Service manual:

ROTARY ENCODER EC16B243040F (D25) VOLUME

Rotel Part # 056 C-4678A01

Thanks for any help!