Hi Pingman, any luck in your search for a replacement dome structure for your passenger cars?
Currently, I'm also trying to track down a more correct dome for my K-Line Union Pacific passenger cars. But I have not had any luck in finding the correct ACF style dome sold separately either. I thought about modifying one of these eBay full length vista dome structures (shown below). My plan would be to shorten it down to 6 windows but I wasn't sure the width would fit my application because it looks like I came from a smaller body 027 passenger car.
The only reason I'm looking for replacement ACF style dome because Union Pacific 7000, 8000 and 9000 series domes cars are not suppose to have an extra horizontal support bar going through the middle of the window.