designing stringer/rocker template

I need to make a stringer for my next project, and it would be super if that stringer was already cut to close to the final desired rocker template.

I really don’t want to screw around with learning a CAD program, but the best I can come up with other than that is to cut and paste the rocker templates from the clark catalog and just scale it up to full size in Paint, print and stick the pages together… Then trace to wood, cut out, etc…

Isn’t there an easier way?