Revision surgeons?
Dr Buchwald would be my first choice for ANY revision. You'll have to have your RnY taken completely down to get the sleeve, because you need your pylorus back in the equation for the sleeve, so you're likely going to have to have open if you're going to stick in MN. Dr Ikrummudin at the UofM does surgery lap, but he's not as experienced in taking down an RnY/doing revisions. Even if he agreed to do it, I think he'd require open, also. Dr Buchwald has the most experience with revisions, so that's where I'd head.
5' 5" - 317.5 / 132 / 134 SW / CW / GW
Just as an FYI, it's unlikely insurance will pay for a revision, for two reasons. You probably don't qualify for WLS anymore, since you don't have 100lbs to lose, and the VSG generally isn't covered by most insurance companies anyway (some do, but many don't). If you're going to pay cash, and are willing to travel, I'd go with Ungson in MX or go Baltasar in Brazil - both cheaper than cash for here, and both excellent revision surgeons.
5' 5" - 317.5 / 132 / 134 SW / CW / GW