Where can I get graduate level "tutoring"?
I would contact the math department at your local university. 

I would be prepared to pay them well, they have lots of responsibilities and demands on their time as it is and it can be quite a lot of work to work through an academic paper, not to mention the effort involved in compiling background material to essentially teach this material to someone else. 

If I were a graduate student still, I wouldn't do it for less than around $75 an hour, because the time I would have to put in to give essentially 2 hours a week of this kind of tutoring would be closer to about 6 hours, so even then it starts to sound barely worth it.