Try FerroBrake & clutch. I think they are in Parow.
When I was looking they said they didnt have & the somehow got contact details for ZF (think they in Stikland) & they said that Ferrobrake should be able to get it for you. ZF does not sell to the man on the street, but does supply Ferrobrake who is an approved Sachs supplier from what I call
Try calling those 2 & see if they can figure it out between them.
Hope that helps