Wish I could say Cougar parts are easy to find but sadly they arent. There are aftermarket rear quarters for 69-70 Cougars and thats about it. There are patch panels for some pieces but they are primarily Mustang patches adapted for the Cougar. You can try
www.johnsclassiccougars.com for used parts. Its in michigan however and will probably cost a fortune to ship body pieces. Good luck. Oh. I would also keep tabs on ebay. I buy and sell many Cougar parts there. Steve. I also have some 68 Cougar fenders and a hood for sale on ebay. Will eventually have some doors for sale.