For the bed I'd need one piece at about 8" preferably 10-1/2 long.
Just curious...thats a roughly a scale sized piece of 16' x 21'....that seems a bit large for stock industry standard sizes. Would the bed actually be a single piece of that size?
I recently used some Plastruct 1/48 scale diamond plate material for a step bumper on my 1/24 scale build....wasn't super pleased with their product...but it did come in an 8x10 sheet, and is thin enough to bend (and works fine for my limited application)
ABER, Eduard, and Lion-Roar all make a wide variety brass/PE tread plates....I know they do 1/72-1/35...and some of it is scale interchangeable....not sure if they do a larger scale...but seeing as some armor kits are 1/16 scale, I think they likely do make at least a limited range.
Sorry about the attached pic quality...it's the best I could do w/ what I had on my HD.