Railworks America

A couple of things I'm looking for for my B&O route (its about 1/4 done at present) and just curious which (if any) of these people have found out there:

Farm barns, silos (I found a package here, but would like something with more detail)
Cement whistle posts (Anyone know which asset it was with Tori's C&O that had one?)
US Semaphore signals (I dont think they exist yet for RW, do they?)

Thanks for any help!

Here is where the whistle post is:

Assets\PCBauer\Addon\railnetwork\Mileposts\COA_milepost_concrete.bin