hifi engine

Akai GX-630DB potmeter

I do own a set of 2 Akai GX-630 DB tapedecks.
I also have the original servicemanual/partlist.

Those potentiometers tend to get a bit creaky after many years.
Didn't use them much.
Greasing will help but it's always better to replace them.
Used original ones are always tricky to buy and expensive.

Two are double vol. ones for input microphone and line, Logarithmic 50K.
10VR1 EV622 078
One is the output stereotype co-axial, logarithmic 10K.
9VR2 EV622 056

Does someone know where to find these or any similar types?
All have a star-like shaft with pull-off knobs.