Steve,
I have not heard any company planning to make M60A1 or A3 interior sets or a plastic kit with the interior but that sounds like a super fun/stressful project for 3D prints! I have a lot on my plate right now but maybe we can discuss next year (2023) to consult on the design if you are highly interested. Btw, this is my latest thread: 3D prints and CADs Part 2 - by petition2God - #338 by James_Lee on 3D designs.