I think you would need to call the saltwater/pet stores to see what they have in stock.
IMO I would go on line and try to get it dry. You will get more for your money. Of course you will need to pay shipping.
I got 130lbs from bulk reef supply and shipping was free. stuff is so costly it doesn't take many pounds to get the free shipping. You can call them and specify what kind of peices you are looking for also.