Unfold and import DXF into InkScape using dxf2papercraft. This is some kind of wrapper extension utilizing kabeja to convert the dxf output from dxf2papercraft into SVG.
To make it work you need to install at least java. Works on Windows and Linux.
dxf2papercraft itself is a tool to make flattened 2D output from a 3D DXF file.
Note that kabeja and dxf2papercraft are really old tools. There might be a lot better solutions out there but this is a good starting point and it basically works :)
You might have a look at
https://inkscape.org/~MarioVoigt/%E2%98%85dxfdwg-importer and https://inkscape.org/~MarioVoigt/%E2%98%85inkscape-papercraft-unfold-stl too.