1985 Jeep CJ7 Repair Parts

Brakes problem
1985 Jeep CJ7 6 cyl Four Wheel Drive Automatic

I need to replace the front brake lines and the old lines bolt directly into the caliper with a 5/16 fitting - the only replacement lines I can find require a banjo bolt. In order to replace the brake lines I think I need a 5/16 banjo bolt however I cannot find one of those from your typical automotive parts store. The local Jeep deal sold me replacement parts 3/8 banjo bolts - these don't fit. I'm trying to figure out what is wrong - do I need to new calipers? Do I need to find break lines with a 5/16 fitting? Or do I need to find 5/16 banjo bolts and hope they fit the Russell Brakelines I purchased from 4WD. The jeep dealer is no help and I can find no publication that tells me what the stock setup should be. Help?