Who sells lead shot pellets to fill an equip.stand

If you have a small, locally owned shop, they might have "reclaimed" shot which is cheaper than new.

audio advisor and others don't carry because its toxic. i would recommend using something else.

Its not gonna hurt anyone inside a stand.

How about copper BBs from WalMart?

If you can use steel in lieu of lead, you can get it from suppliers that supply sand blasting media. We use steel shot to treat aircraft parts and it would be a lot cheaper than 500 cans of bb's or whatever. I lot of guns now use steel shot as well due to enviornmental issues, so the lead may be hard to procure.
Good luck, John