Where can one purchase lead shot for speakers?

Lead is toxic. You can argue if you want but it doesn't change the scientific fact. If you choose to ignore this fact that's your prerogative. If you want to play with it, eat it, stuff things with it please feel free to do so.

for damping speakers and stands...Again, No one can provide specifics that anyone using it for Stand or Speaker damping has harmed themselfs or the environment

The statistics are on my side. More people get hurt driving or walking across the street.

So I say if you want to use led, use it! it works well

I do agree with Don_s as his arguments are valid and make sense although not everybody will have the same notion and continue to use lead in domestic applications. Apart from laws and regulations, think about the safety of your family and loved ones. For normal household the presence of this toxic material inside speaker stands will only bring potential danger not only to adults but small children as well especially toddlers. You would never know if some of these fine particles have leaked out from the stands and exposed to the environment. Better be safe than sorry.

A bit off topic- Nordost packaging usually states "LEAD FREE - Save our environment" on a green sticker featuring a pine tree. Didn't expect the brand to be an environmental activist.

Lead as a straight metal is relatively harmless. It's the Lead Compounds that are toxic. And even then they become toxic only when taken into the body. Keep any lead shot dry, handle with gloves, and don't breathe the dust (if any). If you touch Lead - simply wash your hands afterwards. That's what I do after soldering.

For a little perspective, and a statistic for those so inclined, my personal experience.

After 40 years of daily professional exposure to lead, in totally haphazard and uncontrolled conditions, I thought it wise to ask my doctor to test my blood Pb levels at my last physical.

The test came back as 6 ug/dcl, barely above background levels.

As to disposal, lead has been re-cycled for thousands of years. Look in the yellow pages for metal re-cyclers (formerly know as junk yards). Not only will they take lead but they will pay you for in.

Some will say no lead level is safe, but they usually have an ax to grind, like a profitable law suit, a book to sell, or a career in law enforcement. (yes I am talking to you)

So be careful, use a mask and gloves, don't dump it in the yard or feed it to your kids.

On the other hand, there are other things you could use, so maybe that is the way to go.