There are some nice metal slide locks that work...the problem is, as part of a CYA from the fridge guys, they say that putting holes in the door voids the warranty. Samsung is the only one I know that has allowed holes.
What I would suggest, and something we're looking at on the line, is if you have the 2 door fridge with handles. Take the hooks from there they are now (top and bottom)...mount them on the side panel wall (handle side of the fridge) and use a MUCH smaller bungie, just hooking the handles instead of the doors. The long one, I think has too much play.
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