People who know won't post it. It is copyrighted stuff. This kind of info is probably even very difficult to pull off of the shady sites too since it is somewhat of a rare request. Especially since most with PC's won't know what in the world your asking.
You could always cough up the money for the whole specs. Doesn't the IEEE have these ones?
I´m looking for this question, and i found this link: http://users.breathemail.net/trevor_gowen/rs232/rs232.htm
Here the difference is the conector in the RS232C is a DB9 conector and in a RS232D is whith RJ45 conector, but i didn´t find anythink about RS232E, Please Help-me