As I understand it, MORL was NASA's space station idea from around 1963-1965. They gave up on that in favor of the Apollo Applications Program and the Wet Workshop concept. That did not prevent the MOL (not MORL) people from trying to pitch a MOL-like vehicle to NASA in the latter 1960s.
NASA had an MORL guy, Mike Yarymovych, who was sent to USAF to help them with MOL. He was essentially on detail to USAF to return the USAF favor of helping with Apollo. Yarymovych was supposed to bring NASA human spaceflight experience to the MOL program.