The firm Artifactory Replicas –  From the Ground Up – makes and sells reproductions of NASA blueprints taken from source materials in the public domain.  They call them Aero Art Prints.   The “digitally enhanced prints eliminate water stains, wrinkles, and tears, resulting in a pristine work of art”.

For example, they offer a 18” H x 12” W poster of a Saturn V F-1 engine blueprint:

Saturn V F-1 Engine blueprint

There is a 18” H x 32” W poster of a Lunar Excursion Module (LEM) Component Layout Blueprint:

Lunar Excursion Module (LEM) Component Layout Blueprint

Other posters include: