What about this one
If you want to do this yourself all you have to do is download incscape, download the free plans, in incscape click the files, then open, click on the plans pdf and chose the import settings, try both types interal, less detailed or poppler, more detailed, then select the page you want to open,you will first have to unselect all pages, then click ok. Once you did that it should of opened that page. you can then click file then save as. in the file type menu click one of the two dxf files to chose from. then export. The file will go to the same place that you selected the pdf from. I hope this is Helpful, Jed