Master Models has released a metal and resin detail set for Eduards 1:48 scale Curtiss P-40E

Matters of Scale has released 3D printed Gunsight and Antenna Mounts for the P-40E in 1:48 scale

Plus Models has released sets of resin Norden bomb and gun sights for the Boeing B-29 Superfortress in 1:72 and 1:48 scales

SBS Model is to release this weekend 3D printed Norden Bomb sights in 1:72 and 1:48 scales

Amur Reaver has released a good looking 1/48 scale 3D printed ASP-17 gun sight that was fitted to many Soviet aircraft and helicopters