Where can I find Bag-in-Box syrup?
There are several online places that sell Bag-in-Box (BIB) syrup. You can buy syrup on Amazon.com and eBay. Also, some Costco and Sam's Clubs carry syrup. The boxes come in different sizes depending on where you get it from.
If you purchase a system from Soda Dispenser Depot, you receive a long list of vendors that carry it.