I have a unit that is in A-one condition but I am sure
I need a new cartridge and needle for it. Any clue were
I might be able to find an Astatic or Electro-Voice
replacement.

Hi Ron,
You might try www.garage-a-records.com
They won't have an original crystal cartridge for your 45 player, but might have a newer ceramic cartridge which will work.

The original crystal cartridge can be rebuilt by West-Tech Services in Prospect, TN at (931) 424-1214 for about $45 including shipping.

William Bosco (www.recordplayersplus.com) installs modern ceramic stereo cartridges in the shell of the old crystal cartridge. He bridges the stereo output of the new cartridge so you can hear both tracks of a stereo record on your mono 45 player. He sells these cartridges outright, or will give you a small credit if you send your old crystal cartridge to him.

You can also install a modern ceramic cartridge yourself in the 45 players. See the following website:
www.everythingradio.com/RCA_45rpm_players.htm
Click on "Replacing RCA cartridge".

Poston

:I have a unit that is in A-one condition but I am sure
:I need a new cartridge and needle for it. Any clue were
:I might be able to find an Astatic or Electro-Voice
:replacement.