86fz600

Hey all i currently own a 1986 yamaha fz600 and as most of you prolly know, they are extremely hard to find parts for...aside from buying them from Yamaha. My question is, can i repair cracked or broken fairings? both of my lower fairings are completely broke in half. I tried some J-B Weld but that didnt hold good enough. Any imput would be greatly appreciated. And can any fairings from any of the newer bikes fit with a little mod.?Thanks-