On mine the door catch was part of the frame, I took off the bottom and put in a thin panel to make it match, it was actually the panel from my old fridge as I wanted the veneer to match, my new fridge was from Penguin refrigaration. The size was the problem and of course the cost !!
Checked mine today, yes the seal is magnetic but not terribly strong. I could see the door flying open in less than ideal conditions without the catch.