Ok, so I have a FOIA request for the agreement (who knows how long that will take, as theoretically their are time requirements related to the requests, but the US government has a reputation for dragging their feet on these), but I also just emailed the public relations email listed on the Space Command website. This is their response:
Thank you for your inquiry.
While we are unable to provide you the exact agreement due to proprietary information and expression consent from our partner, we can provide you the standard template agreement.
The template and the formally signed documents are very similar in context.
If you have further questions regarding the USSPACECOM SSA Sharing Program, please contact Mr. Scott Van Sant, Manager, SSA Data Sharing Program.
So, may I ask that somebody from LSF reach out to US Space Command and grant them permission to release the document? Or conversely, I request that LSF request permission to release it themselves.
 I should point out that this agreement very well could put somebody of non-US citizenship into a category similar to “aiding a foreign government” or some other such nonsense. I would urge LSF and/or non-US citizen contributors to be sure that this agreement doesn’t put them in an undesirable position with their own governments.