I buy and sell scrap on the side. I usually buy junk aluminum wheel rims. I used to work for a division of Sears as a mechanic so I know the drill. Usually you give the tire guys some money and they give you the junk wheels.
Recently I was at a large chain tire center and saw a pile of scrap alloy wheels and a pallet of wheel weights in buckets in the back room. Asked them about buying them for cash in hand, showed my wad of $$$, the guy says no, they are not allowed to sell junk wheels, they all have to be shipped back to their warehouse now, the company now claims them as theirs and the company sells them. Asked about wheel weights and they said they also get shipped back to the warehouse. For giggles I offered $50 cash for a bucket of wheel weights to see if he would bite but he said they are expected to ship back so many pounds every month and if they are short they get audited and people get questioned. It seems now that the stuff is worth $$$ the big companies have gotten interested in it for themselves.
Visited a Pep Boys asking the same thing, got the same answer, they said the battery rep takes their weights with the scrap batteries and pays Pep Boys for them under contract. Scrap wheels go to the home office.
Went to Wal*Mart, they said the same thing.
Decided to try the little service stations, every one I went to had someone either a relative or employee who either made fishing weights or else cast their own shot or something.
The only source for WWs I have is a friend who is a general manager of a junkyard, and there is one other guy who buys them, I have to beat him every month, first come, first served, and he's fast.