There is a small Hiesler in Louisiana forgotten in a shed with what appears to be factory paint.
Also a ng Vauclain compound 2-8-0 in Yukon Territory in factory paint.
491 has undoubtedly been painted since it went to Golden. It was stored outside in Alamosa for over 20 years.
Sierra RR #34 is close. I imagine the Sierra painted her in the 1970's sometime, but then she was still in service for her original owner (although at the time she was owned by Reed Hatch). She has been stored since 1980.
The 2 engines marooned in Maine?