No one has them NEW --- it is a parts car or "repair if possible" item....
I have some N.O.S. 12 volt Wiper Switches that were made years ago...
I am in Long Island, New York, if you wish to see one...
PM Craig...West Hempstead
Jim at JS Restorations restores switches and they are awesome. I've gotten half a dozen or more from him and each and every one makes me feel like I opened a Christmas gift with the most beautiful jewelry in the world in front of me LOL
He can be reached at You won't be disappointed and he stands behind his product 100%, incredible customer service also.
I got two from Mitchell motors once, new nos not cheap but 3 speed switches are hard to come by. he was ok to deal with even though I have heard some bad experiences from others. Just thought I would help. Have you tried some NOS only vendors or even ebay? I have come across some items I need @ ebay (many have been NOS). Price was not so crazy.