Interesting idea.  The basic problem is that the UV map doesn't tell you how
the object is "wrapped".  The map is a flattened-out picture of the mesh,
but the flattening or projecting process could have happened in an
infinite number of ways.  

One thing you could do: use a bitmap-to-DXF converter to turn the map
into a flat mesh, then take the DXF into a modeler and use your intuition
or knowledge to wrap it back into the right kind of 3D shape.

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