You just need to buy the new clips that attach to the door...If they have come off, they are most likely broken. If the panel is bent...it may be still okay because there are a number of clips that attach to it....so it may hold it straight.

If in doubt, you can always go to the junkyard and get one for a couple bucks.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k