Well...poop. I could've sworn this part used to be serviced by Dorman or Balkamp, and what I'm probably remembering is the item in my 1988 Balkamp catalogue from years ago.
Nevertheless, I'm not sure you're out of luck. Unless I'm misreading and misremembering, your cruise switch is a sort of "piggyback" design on the turn signal stalk. Tunnelling through many FPCs and supersessions, it looks like 4342 209 should probably fit and work correctly. Still shows as a current part. It's costly, lists for over $100, but you can get it at a discount ($87) from www.chryslerpartsdirect.com .
As a second, potentially less costly but somewhat riskier option, does your switch look like this:
If so, call up Crystal in customer service at Rostra Precision Controls (910-291-2532), and order a part number 58c-08x06-g. It'll be
$35 plus $12 freight, and you can pay with a credit card. Keep quiet about what you want to use it for; the Rostra website makes it very clear that they are not interested in selling parts for other makers' systems. If anyone asks, you've got a Rostra number 250-1315 cruise control system you bought from JC Whitney. This switch may not work with your original cruise system. The only way to know is to try it.
