You can go directly to the website of "Western Transformer" and "Harbin Electric", which have contact methods with users. You can ask them for samples directly, but don't ask for too wide a range. Otherwise, how can others give you ah! I have the national standard information, the same, I do not know what you want those specifications of the transformer. I also don't know how you want to match the transformer? Generally 100MW generator with 125MVA transformer, but then I do not know what the voltage is?
It seems that "Ha motor" does not do that small thermal generator. I wish you success!