Parts for Roland RE-501 Chorus Echo

[Alkotashi]

I wonder if someone here knows where I can obtain parts for Roland's RE-501 echo, more specifically the engine rod/drivetrain and a power button with spring and knob?

This is an amazing and expensive machine that's been the backbone of my live setup for years but now it's fading away from me and I can't let that happen.

Any help or ideas are greatly appreciated