I'v not had experience of this, but maybe it would be a good idea to ask your vet to refere you on to one of the animal hospitals, for expert advice and a vet competant (experienced) in this proceedure. This is if you don't feel your own vet is able, or their facilities good enough for a good recovery. it is your dog, and you are footing the bill, so make sure you have this op where you want it, and have full specialist advice. i would check your insurance policy covers for this first though, because it could be a huge bill.
Good Luck :)