Artistic Media Line Start End Consistent Width THEN taper

Trying to do Iron Scroll pattern and using Artistic Media + Line Width, both are not doing what I thought they would. I realize there are many ways to do this, How exactly to make a consistent Line width and only effect the tip of the line on one side?  My guess is cut the line where the taper should be, but then the line in not continuous. Make two lines stacked on top of each other. Not using a pen pressure tablet. Cartoon artist use this style but not found a good Corel Draw source.