A couple hours up the road to Winston Salem and you can get all the GlossHaus you want. We also have terrific microfiber.
Rock Hill is a little remote, but you're fairly close to Charlotte, NC which is a pretty good-sized city. That whole area is the home of NASCAR, so you might want to check into the
Petty Driving Experience or something similar.
If you happen to be here the weekend of Oct 15/16 there is a pretty big car show in Spartanburg, SC at the BMW plant called
Euro Auto Festival. It isn't a BMW-specific event though - this year's featured marque is VW. GlossHaus is one of the sponsors, and I'm sure they'll be other folks there with detailing supplies.
If you have some time, get to the Cherohala Skyway - a nice driving road in the mountains of NC. The Asheville and Blowing Rock areas aren't too far and very nice.
Have fun while you're here!! PM me if you have any questions about the area (I know NC better, but would be happy to help with whatever). I've been to Australia a few times and really love it a lot - beautiful and fun place with people to match!