I just found this on AliExpress: US $0.99 | 5pcs FFC FPC Socket 0.5mm Vertical Type Ribbon Flat Connector 4/6/8/10/12/14/16/20/24/30/34/40/50 Pin
https://a.aliexpress.com/_mLPnul7
Special thanks to developer79 for his personal effort, relying solely on his own capabilities without any help or donations, in developing and producing the first MXM adapter for the P870. Once the development process is complete, it will represent a major breakthrough for the future of DTR MXM devices, and this laptop will be resold as a barebone at a higher price than it is now.