Where and when can I gain access to a COBie toolkit for Revit 2013? If one will not be available, is there a workaround for updating the COBie information in the absence of the Add-in?
Well you could try the following, probably not recommended by Autodesk
Works for me.
Autodesk: this does not let you of the hook.
The Revit 2013 Cobie Toolkit was secretly released around October 4th.
Here's my link to download it.
Also, make sure to install Update 2 for Revit for better IFC exporting.