I know I just got done asking for something, but I wasn't expecting it to be done in a snap like that... I figured once it was possibly done I'd request something else. This time we come to a locomotive.
As I'm sure most CSX Fans and Railfans in general know, back in 2011 CSX Did an overhaul to some of their SD40-2's and gave them "Square Cabs" from Progress Rail, and renamed them as SD40-3's. Not only was it done to the 40-2's, but it was also done to the Smaller GP40, and the GP38-2 As well. Though not as common and frequent (And more recent than the 40-3), They are also members of the rebuild program.
Here are images:
As you can see, a child object is all that would be needed as a simple cab swap. Cab interior wouldn't even need to be changed, just the exterior view. Hopefully this will get some attention as apparently I'm not the only one who wants to see this in Railworks.