High Sierra Wheeled Backpack Is There A Way I Can Buy A Wheeled Backpack Without The Backpack?

Is there a way I can buy a wheeled backpack without the backpack? - high sierra wheeled backpack

I have a backpack, but I wanted to see if I could be the driver separately.

I speak of those who have not in the backpack:
http://www.amazon.com/Wheeled-Backpack-H ...