Hi Joe,
not sure about yours with the ZF rack but for mine with the Cam Gears rack I went to the local parts store and looked through their stock and I think they were the same as ones from a HQ Holden! About $20. This was a few years ago.
Peter H
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.