I'm new to MINIs, but so far outmotoring.com has been my go-to source. Aaron has been more then helpful on several occasions. I'll continue to give him my business and would recommend anyone do the same.
I ordered the NM power module and a K&N CAI for my '16 F54 S Clubman. Both were very easy to install with the attached instructions. Shipping and service were excellent and I will continue to buy any items I need from these guys.
I went to the outmotoring store on Monday and the lady who helped me was just really nice and easy to work with.