BHB does use Sani-Chips.
I can't get any retail and the company that makes it is in NJ. You need to buy 50 bags (40 lbs. each) minimum from them.
Their closest distributor, also in NJ, only sells with a $300 minimum. They charge $9 per 40 lb. bag, which is great, but I have no place to store that many bags.
If anyone in the NJ, NY, PA, CT area wants to split an order let me know.