Well, I've found one!!! But............... It's in shit condition:

http://cgi.ebay.com/Shure-Brother-M2...3A1%7C294%3A50

I daren't risk it as it's probably broken. I've even found a headshell to go with it (scroll down and see "Shure Tone Arm Head":

http://www.surplussales.com/Equipment/Audio.html

Pity that wouldn't fit on the Jelco...

Marco.