[Fartuess]

No. Legal copy isn't free...

But i guess that Sculptris you can do similiar thing.

I downloaded Sculptris few weaks ago, but i haven't installed it yet. Now it's good time to do this.

Edit:
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Ok. I'm testing Sculptris. In this program reproportioning without destroying details is a bit hard, but possible.

You can use "Grab", "Scale" and "Rotate" Tools with "Limit" checkbox turned on.