If you want the large 63 oz jugs similar to what baristas use, look for the following:
Finding the exact mocha sauce used in Starbucks stores can be tricky because it is a proprietary mix made in-house using a specific powder. However, you can buy retail-ready versions or nearly identical alternatives from several major retailers. Official Retail Options
: Available for local delivery or pickup from various grocery chains depending on your area. Pro-Line & Commercial Alternatives