1600 dist rotor

need to find out the product code for a distributor rotor

1979 ford escort mk2
1600 kent
bosch distributor
anti-clockwise rotation

note; Bosch code GB603 was recommended to me by MALZ and Conventry's and is very close, but does not fit... these are for a few models made in NZ, and do not fit mine, as i have found out...