Unfortunately, this part is no longer available for purchase. Typically, case parts such as this are not stocked in any quantity, even for current production models. Your tv is getting to be an older model, with production discontinued years ago. For older or discontinued models, it is nearly impossible to find them, and no dealer or part source has them in stock. Even when they can be found, the parts tend to be very expensive (sometimes several hundred $).
If you want the factory original base, you can watch for on ebay, craigslist, etc, or check with local tv repair shops who may parting out a defective tv.
Other than that, your best option will be a generic/universal base, or to wall mount the tv. Here is an example: http://amzn.to/1jibnBH or http://amzn.to/1jibux9
They work every bit as good as the original and cost much less.
If you have any other questions, just let me know. Otherwise, please take a moment to rate my service as this is the only way I am credited for my time. Hopefully I have earned 5 Stars but if not please let me know what I can do to ensure you are satisfied. I also invite you to contact me directly with any future support needs at http://bit.ly/1QwLxGh and ask for Nathan.
Thank you, ***** ***** a nice day,