About TX1 module ‘s Connector

Now I’m design the TX1’s hardware,I download the Carrier Board BOM,and know the TX1 module’s Connector is Manufacture by Samtech,and it’s part number is REF-186138-02,But I can’t query the product in Samtech.So Where can I buy the Connector? Can’t I buy it from Samtech?

Please refer to this topic: https://devtalk.nvidia.com/default/topic/894945/jetson-tx1/?offset=79

The P/N is SEAM-50-02.0-S-08-2-A-K-TR

So :

REF-186138-02 = SEAM-50-02.0-S-08-2-A-K-TR