Did you enter your zip code on this page of their site to see if there is a seller near you?

https://www.anchorwall.com/where-to-buy

Yes, that's how I knew they used to be sold by Lowe's. I've type in several locations around the country and the only place it ever says is Lowes.

That's a shame...I put my zip code (southern Maine) in, and found in addition to Lowe's and Home Depot, that places that sell concrete and lumber yards show that they have it. I don't know if that means they have it in stock or if they can order it. You might check those types of sellers near you, if there are any. Good luck!