Dennis,
I hope you won't take Mr 5441's reply as typical of US 2 rail 0 scalers when assistance is requested, especially from overseas.
I notice when quickly doing a little preliminary research that, as with most locomotives, paint and details change over the years -- so if you will be operating / displaying this with a particular set of passenger cars, you'll need to match the locomotive accordingly. Do you have such a time frame in mind ? Do you have a set of decals ?
[ Sarcasm on ] I will have to admit I didn't realize the Class A's were lettered "Hiawahta" .......[ Sarcasm off ]
With best regards, SZ