SC - I tried to find more online info about the stabilization treatment that I learned about and I came up empty handed. A good sports PT should be able to help. You might even want to look into getting a SI Belt for temporary management of the pain when you're having an acute episode. You don't want to use them all the time but they can be helpful when the pain is so bad that you can't really function, or sleep. In rare cases, once the SIJ is lined up properly, I'll put my clients in one for 6 weeks to try to give the joint a chance to stabilize itself. The PT should be able to help you figure out if that will help you.