The 47 with WCML over shap is based on the RSC model- reskin and new scripts. There is a new steam railcar in production, see here http://victoryworksts.blogspot.co.uk/ I have to say that for me the IHH models were poor, most have very obvious faults and poor sounds. If you are less familiar with the real Locos then the models are probably more acceptable. Nobody is sure at the moment what has happened to the IHH models or whether the new RSC 117 is a new model or has been developed from the IHH model.
Wow the GWR Steam Railmotor is really amazing !!!