[NJARC] Phone cartridge for RCA 45 RPM

[TrainBee at aol.com]

Phil and anyone who can give some input,

       I'm looking for a replacement phono cartridge for a RCA 45 rpm 
phonograph.  Can anyone suggest a source, even Radio Shack catalog and stylus 
diameter to look for?  I've been restoring this machine and this is the next 
important part.  The tracking of the original cartridge/stylus is not good.

Thanks.
Joe Devonshire