Thanks for catching that. What had happened was..... LOL The item was originally in the new releases category and since it's no longer a new release it's been filed into appropriate categories. The link up there was incorrect, I have since fixed it. It's included in the sale, please enjoy and thanks again for the catch.
Pretty sure that's because it's not for sale by itself. I think you need the other unit in order to make it work as it's a pack. If not I'll look into it on Monday... Weekend is here and I'm going to take advantage of what we have before the rain/snow moves in.