I got this replacement for a Cobramatic in a 1956 Zenith "Rhapsody"
https://www.thevoiceofmusic.com/cata...th&Categories=
I Then advised the new owner of this equipment that he cannot play stereo records. It would not be hard to swap in a stereo cart but why do this for a pre-stereo unit?
GE carts seem to be a favorite though I have never seen one in the wild.