There used to be a set of buckets and cans that an AM company put out----maybe Custom Dioramics? Anyhow, I don't think I've seen one in stock for years...some kits by Dragon come with a nice PE bucket: their Initial Tiger and the classic Mid-Production Tiger I w/ the Wittman box-art. I used that one to sling on the rear of my KT:
I would avoid injection-molded buckets as they typically are molded way too thick...probably scrtaching one from thick sheet foil or thin aluminum is your best bet, and add a wire handle...sometimes you can find a resin one that even has water already cast in that looks pretty good as well...here is a resin bucket---not sure where I got it:
Another:
Another---to the extreme right:
Another:
