Are there websites or shareware available offering dxf drawings. I have am working with my post and am not a great drawer and don't have software to convert pics to a format bobcad can import.

Just do a search of this site.
There's a complete section called: http://www.cnczone.com/forums/images/buttons/firstnew.gif (http://www.cnczone.com/forums/showthread.php?goto=newpost&t=19346) Share Your Files Part or Art (http://www.cnczone.com/forums/showthread.php?t=19346&highlight=dxf+files)