Plastic melted behind passengers seat, caught fire

2015, 700 wildcat limited edition (blacked out), seen and hole behind passengers seat melting in. Replaced the heat shield as it was making a noise also. Was on a few rides and bike worked great with no issue. Wife and I went for a drive, going very slow just enjoying the woods when bike shut down. When I looked at my wife who was sitting in passengers seat there was flames coming from behind her seat. After reading a few comments on this and seeing that it is an issue. Has anyone seen a fix to the problem. I am going to cut the bad piece out and build new out of fibreglass and put new heat tape on the whole thing