Man I sure thought they did. Pretty sure the inner fender is the same. I thought the chrome fenders were the same too, aside from taillight mounting.
bike bandit part numbers are the same it looks, for the inner fender. they are different for the rear. I checked cmsnl, too. Same thing there.
I think it comes down to the taillight. So, unless you have a 76 light, I would stick with a 77/78 fender.
I would give Tools a shout for a fender. He has a good rep here.
The ride IS the adventure. The destination is just to get gas!