You can get all Roster Editors here
https://www.dsgambelluri.ignitiondomain.com/nhlrostertutorial.html
However. There are no addons there as I did not save them.
I never had a SNES so I never would have known. I just simmed a season to see if there were any irregularities due to the Micah Aviazoff incident from the NHL 94 Facebook page.