66 buick skylark gas tank interchange

I have a 1966 Buick Skylark 4 door hardtop in need of a new gas tank. I can buy a new gas tank that has no filler neck. However, I would prefer to buy one with a filler neck already attached. Does anyone know where I can buy a tank for my car that has the filler neck? They sell new gas tanks for a 65-66 Chevelle and a 65-66 Impala with filler necks and I know that the tank will fit my car, but I am not sure if the filler neck would work. Any help or advice will be greatly appreciated. Emails welcome. Thanks. Bob