Yes, I think I've got something. I wanted to test this with the new issue as well, and it seems to work. There is only one thing: I could not find any logical sequence in the url's for the various issues so I just grab it from the frontpage.
But as of now there is a new issue, but the link on the frontpage is not updated yet. But I am on European Time. So try this out and keep an eye out for when they update their frontpage. If it is too late, let me know, there is an easy workaround for that as well :-)
I tested the columnist recipe with a couple of random selected writers and it worked for all of them. I cleaned it up a little and included it again: the new recipe will overwrite the old one in calibre.
sportsillustrated.zip
Cheers!