GS3 Plastic Back cover has air bubbles and is chipping

I left my GS3 on my bed and went to sleep, and when I woke up I was thirsty and drank quite a bit of water ( some of it spilled on my bed) and the sheets were slightly moist. I decided to ignore it since I was drowsy and just went back to bed. When I woke up, I was leaning on my S3 ever so slightly, and the s3 was on the moist part of the sheet. And apparently I the cover of my s3 was filled with air bubbles and some areas were chipped of the clear cover over the actual plastic cover. Is there any place were I can buy an OEM ORIGINAL s3 plastic cover (please no 3rd party plastic replacements, I want the SAMSUNG original) if at all possible to buy an oem replacement. Any solutions since some parts are already chipped? Should I just keep chipping it and have a regular back plastic cover? Also, I searched everywhere on the internet and couldn't find anyone else who had this problem. If you need anymore info just ask in this thread. I have an ATT GS3. I appreciate any help I can get.

Here is an image of my plastic back.

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(Remove the space between the u and the r, and the spaces between the o and the m. Sorry for the inconvenience no outside or pic posting with less than 10 posts lol)