Yes, they sell live pods and brine, but the problem is that your average bottle of pods is basically a snack to the mandarin. Just one will eat you out of house and home if you try to keep one on bottled pods. They are constantly eating. Depending on your tank size, you may be able to add enough pods to the tank to get a decent colony started, wait a year for it to become estabished, and then add your mandarin. I only recommend this for tanks that are 75g+ with at least 90lbs. of LR.
ORA sells captive bred and prepared food eating mandarins, but some have experienced them just eating pods after being introduced into the tank, even after they ate prepared at the store. They are also a little pricey. These are probably your best bet.
Hope this helps.