They're gone. Not just sold out, but the place where they were on the shelf has a different, unrelated product, and there is no longer a product tag for it on the shelf.
I tried several other stores, including Piazza's, the high-end grocery near my office. No luck.
I've written to the manufacturer to find out if they still make it. I note that the product listing's picture has gone away.
I'll be annoyed if they've discontinued the product. I know it's only dried split peas, but I'm a creature of habit.