chuck insert or similar needed

HI all

If this is posted in the wrong place, happy for it to be deleted.



I have acquired a four jaw chuck, (not scrollchuck) which I intend to use for off centre turning.

However it has a 3/4"x10TPI female thread and I have a M30 vicmarc lathe



anyone know were I can get an adaptor, or adaptors



I have googled without much luck



thanks