Sorry but my XL books only go to 78
The 2010 HD SERVICE LITERATURE LISTS:
Owners Manual - #99466-79A - for 79XL - list price $20.00
Service Manual - #99484-85 - for 79-85 XL/XR - list price $60.00
Parts Book - #99451-85A - for 79-85 XL - list price $48.00
You can contact your dealer or order on-line.