I stumbled upon a reference to "American, British and Belgian enterprise?" being crucial to the massive expansion of Railroads under Porfirio Diaz.
Don't feel strongly constrained by the 1876-1910 dates, as I'm interested in a more general answer even if the specific claim perked my interest.
Belgium delivered the majority of the steel rails used for the railroad switch from narrow gauge to standard gauge which happened in the first years of the 20th century.
At that time Belgium was an economic powerhouse with regards to steel production, the rails for the Paris Metro for instance were also from Belgium.