actually, pacsci is alive and well. bought by danaher kollmorgen.
perhaps if you give the pacsci complete part number, some kollmorgen distributor like us will send u full info on ur present motor and quote a new drop in replacement one too.
u should include part no of drive too - since it may be antique unipolar (waste 1/2 ur motor specs) so one knows what SYSTEM speed/torque u really had.