I love the Multiple Email Recipients plugin! Especially as I can break the multiple emails by stock categories. It was such an easy solution that I thought was going to require API for. This is perfect if you have multiple stock from varying vendors and want to streamline the fulfilment process. The support I received was really quick too, not that it was needed for the plugin, as it was really a question.
This plugin is perfect for what was needed and the support to ensure it was configured correctly was excellent.