I know ya'll can install them, but curious who actually makes locomotive "tires" these day?

strasburg rail road across the street, they probably only make tires for there engines when the locomotives over there need repairs.

I don't know

Strasburg Railroad, right across the street from the Railroad Museum of Pennsylvania. I believe they make them. If not, they could certainly tell you who can.

The Strasburg Rail Road across the street does driver tire installs. Most are machined in house as there are few steam locomotives in revenue service today.