All about the Roland Jupiter-series

hi all,
this is my first post and i deperately need some help finding pots 
for my jupiter 6 that i got on the cheap.i saw a pot and slider set 
selling on ebay but i don't need any sliders and i need more than one 
pot.can i get pots from roland or is there some other source?please 
help cause i'm really anxious to get this thing fully functioning.
thanks,marty