Battery door issue: repair/replace?

After a butterfingers drop out of the case, my battery door no longer alligns well to close correctly. I was on trip to Cuba when it happened. I was able to get it closed well enough to fit in the protective case. I like to swap out batteries on full day missions and am wondering if anyone has recommendations for repair. Can I get a new replacement door? Is there a repair service company you can recommend? It still functions but I'm afraid to open the door and have it break past the point of no return.