I'll defend companies doing 'fake' liveries on one-off locos. Ben Aldo had a good column a year or two ago about such liveries in Model Rail. They sell. And with corpos cinching the purses ever tighter, understandable to find ways to stretch an investment.
I mean, there was only one GWR 101, and I think everyone has had a model of one, and not many in the correct livery.