Korg Mono/Poly

I am wondering if anyone has any tips or leads on where to find these
parts for a mono/poly:

- Main volume potentiometer
- Frequency potentiometer (the first knob to the right of the volume)
- Three way switch above the bend wheel (selects between vco pitch and
vcf)
- Pushbuttons (to replace dead poly button and hold button)

I'm looking to get pots that would match the original ones that went
into the mono/poly.  I have replacements in it right now that have the
same rating and work fine, but they are a style that won't fit the
original knob covers (I am using those giant radio shack screw on type
right now)

The three way switch is broken off, I can select between them using a
screwdriver but that's no fun.  Any idea if where I could find a
perfect replacement?

Also I used to have a link to someone who sells new buttons for
mono/poly and polysix synths (I bought five for my polysix and it
worked great) but can't seem to find a link online anymore.

Thanks in advance for any help