Have you looked on the back of the LCD panel you have at the moment, to see if there is a part number stamped (or barcoded) on it?
If there is 'Google' just the numbers (or whatever you have found), do not mention Vizio in the search as most probably the results will focus on it rather than on the numbers. With a bit of luck you may get supplier info, as the screen is probably not made by Vizio anyway.
There are a lot of sources for the board parts for the TV when you look for tpt430h3-qvn01.u
You might wish to try contacting the people in these links, as they might know about replacement panels.
This is the only panel manufacturer that I can find that has TVP listed in their products, so perhaps they are the makers or perhaps not. How this helps you I'm not sure as I'm thinking that even if they were that they wouldn't supply on a one off basis.
Hopefully this will get you a bit further down the repair road.