I wonder what happened to Autospec. Anyway, Michael Percy Audio, an on-line business, can sell you the Cardas DIN plug. I know he has the female inline connector half; he may also sell the male piece that normally resides up inside the tonearm vertical shaft. Google MPA and use their catalog. Michael is a great guy. Parts Connexion are in Canada, takes forever due to customs.
What you want is DIN plug, female or male (depending upon your need), in-line. Cardas is the best quality I have found, no matter where you buy it.