I’m not too familiar with who sells Mequiars products…maybe it can be special ordered through Advance or Autozone since they sell some of the smaller more common items like wax??? Al Will Paint Supply on Transit near 400 has a nice selection of CarBrite and 3M products if you’re open to other brands. I can’t remember if they sell anything Mequiars, but they carry simliar wheel cleaning products to the one you’ve linked to that work amazingly well.
I’m very open to other brands. I just used a small sample of wheel brightener and really liked it. Maybe I’ll try something else. I can always order from Meguiars, but the shipping on a gallon is going to be killer.
Actually, I’ve been meaning to try 3M machine glaze, though I hear that’s being discontinued.