I found an eBay seller who has very nice, clean used 5-gallon buckets with metal bale handles for sale. His shipping costs are very reasonable, too. The total cost even with shipping was less than it would cost to order new buckets from a plastics company (though these are used, of course, if that matters).
I wrote and asked him about leaving the lids off my order to reduce the shipping weight, since I did not need the lids, and he not only did that, he even reduced the purchase price a bit, which was above and beyond, as I don't know what he would do with the lids alone.
Anyway, check out Jake at StuffForAllSeasons. Good seller, good buckets.