Hi Ivan,
I may able to help you out as I bought (from the US via ebay) the seat wiring looms for a set of pre-facelift seats and now don't need them. You may (or may not) have a bit of a challenge getting power to them out of the car due to the canbus wiring?
I added heating elements to my Z4M seats, using carbon elements, the correct BMW switch panel and adapting an E83 X3 retrofit wiring kit, the result works perfectly but I was thrashing in the dark and thought the wiring loom I mentioned above could be useful (it wasn't).
Happy to bring them with me in hand luggage in September?
Regards, Dave