Some one has used it for this sort of thing ? ;)
http://www.123dapp.com/make (free)

You can export in EPS, DXF, PDF the 2D Plan!

Refound it inside an old folder! :)
Don't know if it's always existing...verified don't yet existing on Start Site!

Terrific Slicer!
(tested an inclined choice)



Without "Sign in" you can Import STL OBJ

And export PDF with this little trick ( "Print to PDF" with the internal MicroSoft windows System) )

So import a PDF inside Moi ;) (here just one slice - (you can "Print to PDF" all model in one pass) :)