If you're dealing with the big stuff you need a big tank. Large plating tanks made of polypropylene are something we make on a regular basis.
Plating Tank Polypropylene 144" X 52" X 78" High, Inside Dimensions
48" x 48" X 48" High, Inside Dimensions, Polypropylene Plating Tank, 1" Thick
72" X 48" X 42" High, Inside Dimensions, Plating Tank Made Of One Inch Polypropylene
