Mori Seiki SL10 lathe indexing gear

Hi All need some help,
Currently I rebuilding a old Mori Seiki SL10, everything is completed but another problem find out last minutes the rear turret indexing gear wear and tear, need help if anyone can supply or know who can supply this Turret Indexing Gear,
I can not direct deal with Mori Seiki.. used (Can use) or new..

Thanks