Seems that the practicality you liked for your Home Depot run would be ill-served by a carpet "mat" - as janodes indicates above it will likely be expensive and wear out fairly quickly depending on how often you use it for cargo.
Most all-weather mat companies offer matching mats for the cargo, rear seat, and front seat areas. The Hexomat material that I mentioned earlier can also be purchased for the front seats so everything would match front to back.
Just my $.02.
That's the truth if I ever heard it.![]()