According to the case drawings in my Hornady manual, the .350 Rem Mag case neck is .355" long and the .358 Norma is .328" long shoulder is .489" for the Norma and .496" for the Rem.
Both show the same neck diameter, so it should be possible to size the neck of a .358 Norma in a .350 Rem die.
of course, it will take a bit of trial and error to get the right adjustment on the die body, and I have no idea if it can be done on your press, with the ram at full extension.
There are solutions you could use as spacers, if needed, such as a piece of tubing cut to the right length....
The specs say you should be able to size the neck without touching the shoulder, if you adjust it right to do that.