"Pennsylvania was once one of our great manufacturing states, and now this all that we can find? Several of those smaller companies even only do parts that might be used by rail companies."
Well then perhaps it would be helpful to rescan the list.
Bombardier, General Electric, Mitsubishi and a few others are hardly "smaller" companies.
And some of the others may have simply changed ownership to a different group of investors and currently have less recognizable brand names outside of the industry.
I had said in the original posting that the American companies were the smaller ones --- look at the last sentence of my posting #7: And I believe that most of the American companies listed are small ones.