Allison,
I had my 7/12 at 18 months post op, so you still have time if you decide to go that route. I had no movement prior to the 7/12 and now at about 2 1/2 years after, I have very good symmetry at rest and do have movement. It's not perfect, but it's a whole lot better than what it was and I'm still getting new movements, so there's no telling what my final result will be (and when!).
I think the best thing to do would be to talk to your doctor to make sure one thing won't interfere with another and find out what the logical first step would be. My understanding is that the static sling would be done after any sort of procedure to try to get actual movement back. I know it wasn't mentioned to me as an option until after my 7/12, in case it didn't work. Fortunately, it did.
Good luck! And I know how you feel, this can make you nuts!
Lori