Steve,
As Capnmac82 stated, Plans 1 thru 12 are all in Longridge's The Anatomy of Nelson's Ships. Quite detailed and very useful. They cover Profile, Deck plans, Standing and Running rigging and even Belaying pin layout among the 12 plan pages.
Looks like Campbell did all those Plan drawings. The other drawings in the book were designed by E. Bowness and then drawn by George Campbell. The 1 thru 12 full sheet and folding sheet plans were all designed and drawn by Campbell and it appears they were done just for this book.
Thanks for bring this up. Longridge's book is equally as good or better than McKay's Anatomy of the 100-gun ship Victory . Much better for the 1805 ship. And much much better if you want a good depiction of the Belfry.
The National Maritime Museum in England has good plans. Some large sheets were published by The Society For Nautical Research. They even have the 1805 rigging plan. That plan has some differences from plan #7 in Longridge's book.
Nino