As a happy owner of both, "ROTW" has scale data not only on the V-2/A-4, but literally hundreds of other rockets (in case you think you may want to build others). "In the Shadow" has great detailed info on dozens of V-2 alternate versions, spin-offs and descendants, as well as the basic rocket.
https://www.v2rocket.com/ also has extensive info on bazillions of color schemes, including almost all the V-2s launched in the U.S. after WWII (every one was unique to some extent).