Replacement pitch/mod pot for K2000 + aftertouch repair

After 20 years of being packed away, I'm trying to resurrect my old K2000S.  I just picked up new EPROMs, SCSI2SD and now onto a couple of repairs. 

 First up, my pitch bend is shot and the potentiometer needs to be replaced.   Does anyone know of a suitable replacement, preferably something I might be able to order from Digikey?  
 

 Also, the aftertouch never worked on this guy.  I've confirmed that the aftertouch strip is at least not disconnected, but thus far no diagnostics beyond that.  Are there any common points of failure I should look for?
 

 Thanks for the help.  It's really exciting to have my old K2k back in action.
 Jeremy