I live just south of Tampa and I find it at Publix in the deli. It's usually on it's own little end display right next to the prepackaged potato salad/macaroni salad. It's not always in stock though. It's kinda hit or miss when I find it. You might want to ask the deli manager if they will order it for you.
Their web site lists stores that carry it. In New England BJ's is listed but I went there last night -- no luck. The BJs where I live is smaller than others though, so maybe they carry it in the larger stores. I don't get off the Island much, however.