PortLineParker
UK Route Builder
I believe that proper dampers and steamcocks could be done as well, though I take it the steam physics are mostly finished.
As it's not me developing the specs I couldn't say, although with the level of detail that has gone into researching these figures I would be surprised if they were doable and hadn't been spotted by now. Whether or not they could be replicated would be an interesting question though and one that I shall ask!
Cheers,
PLP