I was unable to find any schematic libraries on the internet for this connector, including in the Altium libraries! Thus, I was forced to make one. I'm making it available for free use - but if you improve it please share your improvements with me, and others. The footprint is based off both the Foxconn and JAE datasheets which can be found at Digi-Key and Future Electronics.
Here's my link on Google Drive: MXM3.IntLib. You should be able to download it without already having Google Drive yourself. Google might try open it in Google Docs - I'm not sure why - but click on File -> Download and you will get the actual file!