Naturally private companies. are reluctant to part with commercially sensitive planning documents. But this is not true of government departments and quasi government organisations. If you are only interested in examining communications plans for layout and style, there are several good examples on the Net. This is a text-book communications plan. Central Highlands Regional Resources Communications Plan 13.
Several manuals stand out from the crowd and are well worth a look.
Nick Carroll's Guide to Good Theatre Publicity . Carroll edits the Pulse section of the Messenger community newspapers of South Australia. It is an unassuming site with lots of great advice -all of which could be readily translated into other applications. Amid the Operation Countdown information is a fabulous document providing earnest advice on how to promote a road safety campaign. This site and other related sites are all well worth a visit.