Source for parts for Grace 707 tonearn?

Long ago the counterbalance for this tonearm was lost. Love to find a replacement and get back into vinyl.

Often see reference to this Arm in the Japanese Audiophile Magazines I personally Own one, but my Dad has since grown attached, due to fact it Plays 78's

check ebay from time-to-time and get the whole tonearm instead for a misurable price being usually asked.