Hey, Jose, how ya doing? Welcome to Armorama.
If the OP is accurate, I'm not so sure this is an environmental issue. Here are the financials on the manufacturer, "HEBCO INC is in the Adhesives and Sealants industry in HOHENWALD, TN. This company currently has approximately 1 to 5 employees and annual sales of Under $500,000." That doesn't apear to be a big business and this is a pretty niche type product. It's been around for 30 years, so it's possible, if it's gone, the owner just up and retired. They have no website so it doesn't sound like a cutting edge business.
On the other hand, I have also not been able to find any other reference to this being out of production or out of stock at on-line vendors in the couple weeks since this has been posted. Walther's site has this under the product description: "Delivery Information: Almost always available." Neither Squadron nor Greatmodels indicate there's a supply issue.