Hey Otis. Yes, the BMW 752 wheels are in black, and in fact are a production option on the 40i and 50i X7. Can see them on the BMWUSA configurator.
These are what you ordered:
https://www.getbmwparts.com/oem-part...b3J5IFBhZ2U%3D
Note that they look just like the stock X7 753 wheels, but in black. I actually want to do these on my X7 factory order, but are indicated to be only available on the luxury line, and I'm ordering the M-sport line. Maybe I'll just do a winter package with these, just like you are.