1/144 Convair B-36D Peacemaker USAF Heavy Bomber - Roden
A new later variant of the B-36 has shown up for pre-order (no affiliation) at this site, so as suspected Roden are releasing a number of variants of thier recent kit (B-36B Early Type)
Same as B-36B, but fitted with four J47-GE-19 engines, two each in two underwing pods, 22 built and 64 conversions from B-36B.
Interestingly, these are up on pre-order at Hannants:
Convair B-36B Peacemaker Multiple marking options for USAF B-36 Peacemaker strategic Cold War bombers. [B-36D), Manufacturer:Caracal Decals