Steve Grabowski offers the PRR hairpin railing posts in two correct styles. The flat base kind seen on John Sethian's post and the kind where one leg is fastened vertically. I'm using the latter style on a double stone arch bridge I have under construction on my Middle Division. After the bridge is finished and the river poured I'll post some pictures on the forum.
If anyone would like to contact Steve Grabowski to purchase His lost wax brass PRR railing sets you can email me off line and I'll send you his contact info.