You would think that there would be loads of info on that, but there is not really much on GE WW2 tank bn organisation. Plenty on the toys, of course.
http://www.mchome.net/dirk/weirdwars...ganization.htm
http://www.fireandfury.com/orbats/ge...imentsbarb.pdf
http://dspace.dial.pipex.com/town/avenue/vy75/toe.htm
http://books.google.co.uk/books?id=b...sation&f=false
- for whatever value you make of web sources.
For the Germans - it was really a case of whatever was available to hand. TO&E charts were simply administrative theory, and if you want the specifics of a particular formation at a certain date then you really have to research their war diaries, returns of strength forms etc.
Andy