Not sure why you’re saying this. The Areca TB3 optical cables are still sold, not discontinued, and still in stock at B&H. I’m assuming there was a temporary stock shortage a few months back and you blew that out of proportion.
Also, Areca made this cable on their own. The Corning version has a different termination size/style. Areca is a reputable organization that makes great, if niche, products that are relied on by many pros. I personally have used 3 different products from them in daily studio capacity and they‘ve been rock solid. Their website looks like the 1990s, and their products aren’t as pretty as the competition, but they are reliable.