Unfortunately, the reality of the modelling is that the B-35 is available in 1/72 and the B-36 in 1/144, 1/72, and 1/48 as injection-moulded plastic kits, whereas the B-32 which would have been in service in large numbers to supplement the B-29 had the war gone on to 1946 (well, 1800 B-32 orders were cancelled at the end of the war vs. 5000 B-29 orders...) only exists as a resin model in 1/144 and 1/72 (barring some obscure vacuforms).