You're gonna have to use two sheets....
How is it being used? Does it have to be coroplast? The only thing you'll be able to get at that length is lexan roll stock.
Where is it going? how are you installing it? How are you producing it? Direct print, or Vinyl mount? You need to provide more details on the project as a whole. How you do this specifically, depends on your capabilities - and installation - and transport.
I'm looking for some good suggestions on how to make a 182" w coroplast sign that typically comes in 96" w sheets. Does anyone know of any companies that sells coroplast sheets this large or any suggestions on how to extend the 96" w standard sheet?