Discussion about the Korg PolySix synthesizer

Hi!

My EG intensity pot (the one with the center notch) has suddenly got all gritty feeling when I 
turn it and I fear it's on the way out and would like to replace it before it goes.  It all the 
sudden feels like gravel is inside!  What is that?

I checked vintage planet NL but they say they are out of stock.  Does anyone know where I 
can find one?

Thanks!
adr3lay