Mars Models is to release 1/72nd Tupolev TB-3 (ANT-6) and G-2 kits.
Source: http://www.britmodeller.com/forums/index.php?/topic/234984592-148-yakovlev-bb-22bis-yak-4-by-mars-models-released/?p=2071571
ref.72001 - Tupolev G-2 (Туполев Г-2)
Sources:
http://models.in.ua/item/1312/полярный+самолет+tupolev+g-2
http://www.ruscale.ru/product/mars-models-7201-tupolev-g-2tb-3-172/
Source: http://scalemodels.ru/modules/forum/viewtopic_t_58739.html
V.P.