Denon PMA-700V Amp Pot and DCD-1520 CD Player Lens Assembly parts

Hello,

I am new to the forum and joined looking for some help.
I own a set of Denon PMA-700V and Denon DCD 1520 which have been working well until two years ago.

The Denon Amp Balance potentiometer started failing and now needs replacement It is a 250K Pot.
The CD player Pickup Lens (KSS-151A) afiled and also needs replacement, preferably the whole CD Tray assembly

Is there anyone who can guide me to a source for these (Very) rare Denon spare parts?

Thanks and Regards,