Just an FYI, to save others the time it took me to track this down. While MSA, Black Dragon, and all of the local parts houses couldn't get me a new PCV hose, the Nissan dealers (local or Courtesy) still have them (or can get them on order). Of course, it's still like $45 or something, so don't do it unless you really need to. For example, don't take off your intake for a rebuild, leaving the PCV hose attached, and then set it down on the hose. In theory, it could split the hose. Not that I'd do anything like that, of course.
Dave