FWIW, this has come up somewhere on the forum before, and I believe that any vendor content we get is submitted to Autodesk from the manufacturer, purely from the goodness of their hearts.
Also, Autodesk doesn't chase down the details of the catalog info to update it, once it's submitted to them. The catalog info that came with my install has a couple of model lines that no longer exist, or that have changed. (I'd rather have them focus on making the software work better anyway.) There are many reasons why some manufacturers don't offer info to Autodesk, sometimes because they have affiliations with some other software product.
It's well-established that ACADE users will have to make their own symbols and blocks occasionally; there are tools included in the software for this purpose.
Jim

Jim Seefeldt
Electrical Engineering Technician