Welcome to the forums.
At this stage there are no reproduction complete panels available although there is talk of them being available soon, but no definate time frame has been mentioned.
A lot of guys that are restoring coupes use the opposite FRONT guard wheel arch and cutting them out and grafting them to their rear quarters.
I hope this is of some help to you.
http://www.fordforums.com.au/showthread.php?t=11275994