Couple of calipers available right now on ebay from top rated seller and free shipping of course with 30 day money back guarantee (more than enough to check calipers):
Right caliper:
https://www.ebay.com/itm/Passenger-C....c100677.m4598
Left caliper:
https://www.ebay.com/itm/Driver-Cali....c100677.m4598
They are also from 2012 X5M with 74k miles and it looks they come with everything needed like clips, pins and even pads lol. Sensor is also included with Left caliper I think (afaik it's 1 sensor per axle)
Anyone wants to join the little project and make it a "who will paint it best color" competition