Email notice of sale to supplier

Is there a way to set up ZenCart to notify a specific supplier (one of several) that one of their products has sold?

I have a small store selling my own products - I want to add new products from several people (some selling more than 1 product) and be able to automatically alert them to the sale.

I realize this will take some custom coding, which I should be able to do - if I can get some clues as to where to start. I assume there are notifiers in ZenCart that happen when a sale is made, and I do have each supplier in the "manufacturer" field in the product setup. So I would think that what is needed is code to look for the manufacturer of the item and send the notification to that individual.

What I need is some guidance on where to look in the cart to do that.