The Dec issue of Model Railroader features the new additions to Rod Stewart's huge HO layout which features several new CMR buildings kitbashed. Many of them were not kits and done custom for that purpose.
I had built a few copies of them for a client and altered them a little from the originals or Rod Stewart Versions. I'll eventually add a video on youtube to go with my steel mill video in N.
Here's one example I had done for someone with the original Stewart building on the top and the altered version on the bottom:
From my flickr photostream:http://www.flickr.com/photos/45970544@N03/
"Original Waldorf Model pictured above as featured in model Railroader and Jimmy Kimmel Live interview. HO From CMR. My slightly altered version stands below in which I had to chop off 4 floors to get it to fit in the clients space. At the same time the top was altered significantly to improve the step back flow as it moved up the building. It identifies less as the Waldorf Astoria or the original model."
I had worked with Jeff at CMR to do the customization on their end to shorten the building a bit in the computer.