I was speaking to the U.S. importer for Deutz-Fahr tractors and he told me they will be phasing out the importation of tractors with Deutz air-cooled engines.

This is due to emission and noise regulations coming into effect for tractors. The air-cooled engine doesn't do well.

They will still import the tractors with Deutz liquid cooled engines. Here's a link to some info on their tractors:

http://www.cwfarmequipment.com/main/brands/deutz.html

They seem to have good specs. If you want an air-cooled Deutz there are still some in the pipeline and in the USA for sale but not for long.