Where can I get some pieces for Battle of the Bulge? Do I have to buy a used game?
Welcome, this looks like an older thread to jump onto, but you may find pieces via ebay or similar, however it's more likely you will just have to buy another copy of the game to get the pieces.
You may want to start a thread in like player help or even the BOTB forum about if anyone is looking to get rid of pieces.
House rules/player help may have threads about 3rd-party vendors who can get you similar pieces or scale ones that could work as well.
I personally gave up looking for extra pieces and just picked up another copy of the game.