Read 'A Day In The Life Of Ivan Denisovitch' by Solzhenitsyn. The prisoners in the Gulag cast their own spoons from aluminium power cable.
It would be easy from aluminium cans. Dig a shallow pit, light a fire, throw in dozons of cans, wait, let fire out , collect aluminium puddle from pit. Then cast a spoon from a plaster or sand mould. Casting we did a fair amount of at school, it is straight forward. You can even do it in a Gulag.