Hi S~Writer:
Welcome to the site. I don't think Ford ever put black interiors in Explorers, especially in leather. You could get your seats recovered by an upholstery shop. There are a few companies that sell replacement seat covers in many different colors and materials that you could install yourself or have someone do for you. Do a search on the internet for the covers. Also, I've seen a number of threads on this board about people painting and dying interior pieces black, so do a search here, too.
I've never seen a black explorer with black wheels. That would be different for sure. That might look pretty good, but it would depend upon the wheels you choose. Maybe if they had a polished outer lip they would look good.
I've never seen luggage racks in chrome for Explorers. Not sure I want to, but hey, it's your truck.
Do some searching around on this board. There is a bunch of information available. Most anyone on here will help if they can. This is the place where I got many of my ideas. Once again, welcome.
Regards,
John.