There is no species is indicated the Triceratops skull specimen in the Birmingham Thinktank Science Museum, but the growth angle of the horn show it may be T. prorsus.
I modified my Triceratops model to new version based on this skull.
And last year, I made a design for a Kowloon park exhibition in Hong Kong that show in this year.
Considering the affinity and simplify the production, I let it back to a straight horn and making the eyes more friendly.
Turntable in Zbrush