There was one created by NorfolkSouthern37. Kuid2:45324:100072:1. I have it in 2006 and just a few minutes ago moved it (and it's dependencies) to 2010 to see what would happen. It installed and works fine in 2010 with a few warnings. For whatever reason, most of the dependencies were already in 2010. However, I guess it is "out of production" now. I'd say JointedRail might be a good contact since they "own" the 4141.
The prototype 4141 hangs out most of the time here in North Little Rock at the UP shops. Local rumor is that UP is keeping it in good shape as a possible burial train loco when George Bush, SR (President #41) dies.