I have an original (not aftermarket/knockoff) BMW Y-cable for sale. It plugs into the USB and aux ports under the armrest so you can play music from your Apple 30-pin devices and still use the headunit and steering wheel controls.
Since virtually nobody uses 30-pin devices anymore, I will also include an Apple 30-pin to Lightning adapter (original from Apple, the 20cm version).
https://www.apple.com/ca/shop/produc...in-adapter-02m
$60 for the package, picked up in Peel region (Mississauga/Brampton).
PM me if interested.