Gosh. The $$ is scary not to mention the invasive procedures!! The more doctor's opinions you get the better right?? In your shoes, I would go the distance to at least see what the imaging shows. (( What is Open MR-guided Injection? )) The more you know that better doctors can fix and many doctors don't like to recommend surgery as a fix-all.
Sorry if I didn't address your concern(?) I think I'm just feelin opinionated today :P Please keep us posted!!!