Hello Steve
Great model photo and scenery detailing on the 2 track line with side track ! I have two O Scale SIRT cars by IMW -- mine seem OK to me but I have not worked on them yet -- they will become BMT cars in the Maroon with cream window band. I should give MTH VP Mark H at MTH a call for a chat -- its been over a year or more since we last talked informally. After my long stint helping MTH on all the NY Subway sets BODIES produced from 1999-2000 up to about 2010, I have not been further involved since then. And MTH has not produced any new tooling for any new (previously non produced) car types since the R-142's were produced. Good luck with pushing the SIRT cars with VP Andy at MTH. I know you have tried for many years so far. They could do them as the B&O various color schemes, (Blue Scheme and Green scheme) and the later scheme final BMT operation used paint scheme
Regards - Joe F