Sorry - I meant Car Analysis. They will be offering it before the end of the month. They sent me the prototype and it is perfect.
I have their iDrive and start/stop buttons as well. I also ordered a start/stop button through Aliexpress and it did not fit as promised. This is the only company I would trust for these things. I believe the volume knob will go for $29.95.
https://car-analysis.com/BMW-Crystal...5-X6-X7-Z4.htm