Yep, the '77's had shrouds. I have been told that the reason you don't see a lot of older CJ's with shrouds is because they were made very thin and tend to rust out and disintegrate after about 10 years. I had no success finding any used ones. You might be able to order one from a dealer, but I hear they are getting scarce. I eventually decided to go electric anyway.
'79 CJ-7
'79 CJ-7