WTB 67-69 barracuda quarter panel chunk

My dad and I are building his aspen R/T and he wants to put a barracuda flip top gas cap on it. we need the area of quarter panel around the gas cap to weld in his quarter. Within the next week the new quarter will be ready to go on and I really need to weld in the gas filler area before I can do that. Been having a heck of a time trying to locate this piece. I was refered to this site in hopes that I could find this. can anybody help me out!?!?
thanks
-Kaleb