Mine ended up being 'most similar' to the ones for that era Mustang/Torino. An ebay search will generate lots of candidates. If you want a 'power' antenna, you can order a Hirshman (I did) and mated it to the 'original' base I had. LOOKS PERFECTLY NORMAL.
My mistake however is that the antenna mast is too long. All the way up, it pierces rain clouds, so check the 'extended length' before you buy an antenna (or Viagra for that matter.)
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