Looks like Pet Supplies Plus is still doing their dollar per gallon sale if there is a store somewhat near you. You just need to sign up for a membership (if your not a member already) like you do with petco for their dollar per gallon sale. You can order them online to make sure they are available at the store, and then stop by and pick them up.
Thanks Mitchell, pet supplies plus is a distance away from me. I actually planning to buy two from the dollar per gallon sale at petco, but was wanting to see if there is any member here that would have any they like to get rid of.