Alex,
First you must obtain the list of the assigned Bostons from Russian archives, like:
41-2705 - (36 DBAP ЧФ)
41-2873 - (36 DBAP ЧФ)
41-3258 - MIA 19.06.1943 (30 АП ЧФ)
43-21667 - Norway, 36. MTAP, Ml.Lt. Victor Dmitrievich Ladigin (KIA)
43-9156 - Norway, 36. MTAP, Lt. Sergei P. Batrakov (KIA)
6265? - MIA 25.04.1943 (27 ОРАЭ ЧФ), Wright-Cyclon: 41064; 41068
....etc-etc.,
...then you may purchase the Individual Aircraft Record Cards for each of these planes by serials with manufacturing dates, delivery dates and routes at
aair@aviationarchaeology.com. (See sample.)
I assume, that most of these planes arrived via the South-Atlantic Ferry Route (California, Florida, Caribbean, Brazil, Ascension Is., Nigeria, Sudan, Egypt, Palestine, Iran, Soviet Union-Crimea) Good luck!
Gabor