I found thousands of links for "bondage bed/ bondage bed accessories" with a simple google search.

Nothing by the way of blueprints however; but I am sure if you use a little common sence and study some vanila bed designs one could come up with some interesting modifications to make with a little help from Home Depot or Lowes.

One site in paticular provided 19 links to different bondage bed and furniture sellers where if you dont find anything that stikes your fancy you can atleast get inspired for a do it yourself project.

http://www.masterzchicago.com/showlinks.php?catid=8