Welcome to the forum.
Unfortunately you’re likely at a dead end. The EPA pushed H&S out of business years ago and there’s no support for the MiniMaxx at all. You will probably be better off finding a dealer that will sell you an EZ Link. Search the forum and you’ll find Canadian dealers who are selling to people in the US.
Edit: I tried opening the link on your MiniMaxx and it won’t open so I started searching and found this:
www.minimaxx.ca
Unfortunately you’re likely at a dead end. The EPA pushed H&S out of business years ago and there’s no support for the MiniMaxx at all. You will probably be better off finding a dealer that will sell you an EZ Link. Search the forum and you’ll find Canadian dealers who are selling to people in the US.
Edit: I tried opening the link on your MiniMaxx and it won’t open so I started searching and found this:

Updates | Mini Maxx V2
