Here are some images of Monograms 1/48 scale Willy Ley concept Space Taxi.
From Fantastic Plastic" Another classic Willy Ley design, the "Space Taxi" or "Space Buggy" is,
in the description found on the 1969's re-release box, an "Intraspace
cargo/passenger carrier designed to move men and material between space
cargo ships and manned space stations." Its clunky, purely
functional design is typical of the brass-tacks engineering aesthetic
that characterized conceptual spacecraft during the second half of the
non-aerodynamic shape, the "Space Taxi" proved to be popular enough to
warrant multiple re-releases following its 1959 debut. In 1969 it was
released with chrome-plated astronauts and machinery cages and it was
released again in 1996 along with the "Passenger Rocket" as part of
Revell/Monogram's "Selected Subjects Program." From Wikipedia" Willy Ley (October 2, 1906 - June 24, 1969) was a German-American science writer and space advocate who helped popularize rocketry and spaceflight in both Germany and the United States. The crater Ley on the far side of the Moon is named in his honor.