SNMP monitoring on an isloated network?

I need to monitor devices that are connecting to a service providers network, but they will not allow us direct access to pull SNMP. We need to see real-time info and I am looking for options. The SP is running SolarWinds and they are willing to *kind* of work with us. Does anyone have any suggestions on how I can get access to the data? SNMP forwarding? SNMP Proxy forwarding?

Thanks