Looking for white saltwater aquarium sand need enough for a 2” bed for a 180 gallon tank will come pick up and scoop myself, preferably from a precviously established reef.
Honestly for live sand I really don’t, you can add some to normal sand to help take down the overall cost, you can also see if your lfs (if you have one) will do a bulk deal on live sand if they sell it
Edit: Another tough thing with getting sand from a tank is it would probably have to be from a breakdown because it can really gunk up someone’s water, in rare cases even semi nuke it