Incorrect. They make everything from the 303E and up.
As a matter of fact the 303.5E2, 304E2, 305E2, 305.5E2 and the 308E2 are built in Athens Georgia by American workers spending their wages in America in a new factory they opened in October 2013. They will also be making their D3,D4 and D5 out of the same factory starting in 2015. Previously, their minis were part of a joint venture with Shin Caterpillar Mitsubishi since 1963 which they completely purchased in 2008. So in essence they have been building their own minis from 3.5t since 2008.
http://www.ajc.com/news/business/new-athens-plant-key-to-caterpillar/nbdcg/
Kubota makes a good mini, but I'm pretty certain that the money they make from the US dealers gets spent in Japan.
It is correct that Wacker builds their minis from the 302.7D and under.