(Forgive me, I haven't learned how to paste other postings into my replies, yet.)
SofaKing01, a 4x8 vacuformer would be a bit of an undertaking, but the learning experience and output potential would be great! Maybe, do both...? Start with a smaller one, then graduate to the large?
...still be a huge help on your build, and useful for other less-sizable MGL pieces. No matter what - sounds like you're having fun
HiPo, you're absolutely right! - the big pads are curved/concave with the tubular corridor walls (I just checked the movie). That does add difficulty - making the curved plugs and getting the right pulls - but might still be worth a try.
Grain of salt... It's trickier, but still possible:
Make an upside-down box out of MDF with sides thick enough to shave down to the rounded edges. Then drill tiny holes in the belly of the flat/curved surface to suck the plastic into the concave area. The upside-down, hollow box approach should allow the air to be vacuumed through the plug without all of those tiny holes having to line up perfectly with the holes in the tabletop. The cons are: First, that I can't say I've done one this big before, myself, and the tiny holes can leaves slight dimples in the final product. But it's fast, and there are a lot of pads to fabricate. The dimples might be slight enough to ignore, or easy enough to fill quickly with putty.
Wow, just scratched the surface, and it's VERY CLEAR THAT YOU ARE A BRAVE SOUL, SOFAKING01!!
Is there any tiny piece of this project that is simple and straight forward? (Totally worth it in the end) My hat's off to those who work on this project - more power to you all!!