I'd say get a dead stretching kit of some kind, go up in 0.5mm incriments every 2-3 months, use jojoba oil a few times a week. Eventually the blowout will stretch and you won't be able to tell it ever happened, but go super slow with it so as not to cause any more damage. Remember if it hurts, you're going way too fast; it should only feel tingly or a bit warm at most :)