Rebuilt my vacuum antenna for our 55 Cadillac Fleetwood. I purchased the kit from Wunderbar Custom Radio Shop. I think it was a pretty easy rebuild. I think they are for sale on eBay. I bought mine when it was being promoted.
Keep Cruzin,
Bob
https://youtube.com/shorts/h0YkOe88-Ns?si=Girkxg7Y8YHGpWeu
Good because I'd love to rebuild my 50 antenna. Goes down but not up!
Timo at Wonderbar radio has done a great job of manufacturing this kit. A very affordable solution.
Phil