Big Al's is in Fort Lauderdale and they carry eco for about $17.00 a bag.
If your buying lots of bags it might be worth the trip. Its about a 4 hour
drive. I drive to Fort Lauderdale 2 or 3 times a month and would be willing to pick some up for you if needed. In fact I will be going there this weekend to pick up 2 bags and some other stuff. I Live in Sarasota so the drive here from lakeland is about 1.5 hours.