01-23-2019 01:56 PM
The ThinkPad P50 ships with an Intel Dual Band Wireless-AC 8260ac card, which has 802.11ac and Bluetooth 4.2 radios. The Intel Wireless-AC 9260 is the new model of the card which has 802.11ac and Bluetooth 5.0 radios. The FRU P/N is 01AX771 for the model with Intel vPro management, or 01AC769 for the model of the card without Intel vPro management.
Keep in mind, that the P50 never shipped with the 9260 card, so it's not an Officially Supported Configuration, but I put the 01AX771 card into my ThinkPad P50 and it seemed to work fine without any issues.
01-23-2019 11:28 PM
I have bought them on both Amazon and eBay.