J.P.
Not to quibble, but parts are available for the ZF 5 Speed from ZF. If you go to their site for Oldtimers, they have a listing of repair parts that are available-supposedly right now. They are also producing a replica of the ZF S5-20 that is supposed to be delivered to those who ordered them "soon". Now all that being said, ZF is not very communicative via email on these parts and how much they are or even how to get them. I was able to get a brand new reverse switch recently from ZF with the help of one of our UK members who deals with ZF regularly but even he had problems getting timely responses from them. The other thing about these ZF boxes is that a large number of the parts such as the bearings, nuts, bolts, washers, studs, etc are commonly available DIN/metric items. Castings and shafts are another issue. Some of the parts are in common with the ZF S5-20 model used on the Maserati and there is at least one Maserati supplier on the West Coast that has both new and used parts. They even carry the repair manual.