I haven't even owned the Xterra for 24 hours yet, and I'm already looking at upgrades. Drivers seat has worn to the point that chunks of foam fall out of it all the time. There is also a faint odor in the car that smells like someone tried to clean up baby poo. Needless to say, I'm thinking of replacing all of the seat foam and covers. Has anyone else done this before, and where did you find the foam? Also, I'm thinking leather but not willing to shell out thousands. Any suggestions?