Buying an additional Car Seat Base for Eddie Bauer Ashland Adventure Travel System?

I am looking for an extra base for the Eddie Bauer Travel System. We have one in our pickup but I would also like one in my car. Does anyone know where to find one online? I have found them for the other travel system that Eddie Bauer (Endeavor) offers but not the Adventure system. The product number is 01603AAI. Please help as our baby is due in less than two weeks!! Thanks!!