Aside from the Autodesk Wiki site?
Probabaly not as the Mastering Revit MEP books seem to a decent replacement.
I doubt it has been written yet as don't recall seeing any announcements. The normal channels are publishers or bookstores, either online or real world.
Right, it isn't in any way acceptable!.
6 months later and I'm searching for something that I can print and I've come up with nothing. There are posts from a couple of years ago asking for printable manuals and - best answer was Autodesk were "working on making the wiki help easier to print", so ok where is it then because I can't find it.
There are resources other than the wiki guide. Can't your company acquire a Mastering series book for you and your office, either hard copy or subscribe to a book repository that provides access to digital versions and is regularly updated with the newer titles? Your company could also provide access to suitable training material, which is web hosted and would be just as useful (if not more so) than the wiki. Many of the descriptions on the Wiki are ridiculously brief and unhelpful in a real world application, if they have even been documented (ADSK are notorious for missing key information on how their products work from help files!)
If not then forums and Youtube are really your only other legal options. If your company is blocking Youtube then they need to be convinced that you are a special user that needs access to it for training needs. This was the case at my last company because Youtube has many educational videos aside from Revit ones. Otherwise you are unfortunately going to have to learn in your own time using Youtube and a home licence of Revit.