Stop Block For position #1 using SpringFactory v1.2.1
https://grabcad.com/library/springfactory-v1-2-1

Stop block inserts into #1 on the base.  Front stop should be right up against / touching the bending mandrel base.  The front edge could possibly be filed down to provide about a 1mm gap between the stop and the mandrel if you want a slightly wider spring.