Replacement soft pads for PowerPlay mousepad?

I bought the PowerPlay mousepad a couple years back, and it's been amazing, but I think it's high time I replace the mousepad portion of it. As mousepads do, it has gotten more dirty than I like. I've perused the Logitech site and a couple other places, but I can't seem to find if it's possible to order another of the actual mouse pad portion of the product.