>>690470Not sure what you mean by "plunger" ... if you can't easily find an OE replacement, might have better luck having a local shop build a custom cable assy. Motion Pro has helped me out with custom designs in the past too, good job for good price.
Poke around for a parts fiche (most dealer's websites have them), drill down to part numbers, then see what's available on ebay. New parts for a bike that old might be tough to come by, but takeoffs aren't too hard to find with some looking around.