any big box store will carry it. You have to get 0000 steel wool and it's basically one use and it's done (if you try to save it. longer than a few days it rusts) so cut it into smaller pieces big enough for one time use
i just picked this up. ive read some back and forth thoughts on whether to use steel wool #0000. ive used it on stainless tips before with glass cleaner and liked the results so using it with metal polish will look even nicer.