Where can I purchase 1 Miller Engineering Union Pacific Animated Sign #3781?
Welcome to the forum.
The following on line retailer has it.
Model train stuff is one of the best sources for you railroad supplies. Good prices and super fast mailing
Try this link.
http://www.modeltrainstuff.com/Miller-Engineering-O-HO-Union-Pacific-Shield-Sign-p/mil-3781.htm
Happy RailRoading
Bob
Don't Ever Give Up
That sign has been out of stock for some time. Miller Engineering drops products after a production run many times. You might want to send them a note to see if they plan to re-run it...
Jim
Modeling BNSF and Milwaukee Road in SW Wisconsin