Hi N1KK0,
I have bought parts from Terry but I do know he has a mountain of all types of Deutscher machines and if you can't locate one he would be the person I would be contacting. The Greenies are a good machine but anything I end up with has been flogged to withing an inch of its life and there is massive hours involved in getting them back into good working condition. Deutschers can also end up in this condition as well but there is less parts , particularly the steering that can cause you grief. An early Rover tiller steer might also be an option, but they all generally need a fair bit of work