That would defy physics, my friend. Think about it... 4 leathers to make 2 boots. You "technically" cut those leathers into the right shape, therefore you lose material. It wouldn't be able to even yield one leather, due to the fact that they're all cut up and not an exact cow hide anymore.
EDIT: But I'm sure we could make a plugin for such, if someone is willing to do so (I'm too lazy to make it, haha).