WTB Head unit and sub box for 02

I would like to buy the Rockford Fosgate head unit and subwoofer/box for a 2001-2004 Crew Cab.
I just bought the truck and it is a 2001 Crew Cab long bed SC with most of the original Fosgate stereo, how ever it has a aftermarket head unit and the sub is missing. I know its not the greatest set up but, I would like to make my frontier whole again.

Thank you