I have used a product from tti (template tracer inc) which is pretty good but you have to give up real estate for it (12'x3.5' roughly). This one creates the dxf complete file from your template (fillets,lines,arc,) in closed polygons. it was design for the counter top industry but similar to application. Used you can pick them up for 2k-3k us dollar. half of the granite counter top guys are going out of business.