I'm sorry, JeniLynn, I just don't know where else to go. Maybe someone else does. I can't believe that S & H is sold out. I've never seen that before (Amazon has been sold out forever.) S & H are such a big company--they must be planning to offer the Biostacks again. Must be a sign that more peeps are composting than ever before.
I couldn't even pull up Biostack on their website. There are four Smith & Hawkins locations in Ohio - you might be able to call one near you, and see if they have one in the store. I don't know where Springboro is, but their Ohio locations are Cincinnati, Cleveland (2), and Columbus.
JeniLyn: I bought both of my biostacks at the Cincinnati S&H store at Rookwood. They seem to sell out pretty fast . I had them special order them for me. You might try to do that. You might have to be persistent, but they can do it then will call you when it arrives. No additional charge to special order.