I'll be starting a build thread soon over in General Modeling for my 1/2-studio scale Space Academy / Jason of Star Command build; been compiling ref pics and screencaps and stockpiling parts since 2018. Lou Scheimer's book said that he could only afford to hire part the MCA-57 team, and made it plain in a video interview that he had minimal budget to work with. My best guess is that they (Jonathan Erland, Lorne Peterson, and Paul Huston(sp?) )used a fair number of leftover parts from their Star Wars model kit boxes. What I am doing is making screencaps from the dvd set, printing out sections at the scale I am building, and trying match near-equivalent small scale parts to that.