Buttock lift due to giant nevus. (photos)

I have a giant congenital nevus located on both my buttocks. Due to weight fluctuations (kids) it stretched and now I have one buttock exceedingly larger than the other. I've been told I need a butt-tuck and have done it before but because of the size of the nevus and 2 more pregnancies it stretched out and is disproportionate again. Can anyone give me an idea of the cost, who the best doctor for something like this would be, and down/recovery time?

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