I haven't read the whole thread, but Home Depot and Lowe's both have food-grade buckets, but they're only 5 gallons, in white or black. Also, they do have gamma seal lids, which I just found out about through homebrewfinds.com the other day. The model number on the product page is a hint, but the labels actually did say "Gamma" when I picked a few up a couple days ago after work.