You should be able to do this with DraftSight software. It let's you do a PDF export and I have been able to open every AutoCAD file with it that I have tried.
If you can find another way to get it to me I'll convert it for you. It wants me to sign in using a social networking site credentials and I'm not willing to do that.
"Any DWG to PDF Converter Pro" converts DXF or DWG files to PDF, one or patch to one file. Auto Cad not needed.
Simply final "paper" size selection, "Printer" not needed.
With Acrobat pro it is painfull science, it u-stand only "Letter" final size from dxf.