Have you seen the Early 1908 Thor at www.batorinternational.com/
I have the exactly the same model and was looking for a carb for mine - I've spoken to Glenn at Bator Intl. who mentioned that the carb was made by Thor !!
Thor (The Aurora Company) also made engines for early Indian singles - so is it possible they used or copied the Hedstrom carb ?
Any help would be greatly received