Here is a link with some material on the E series
http://www.achtungpanzer.com/pz9.htm#eseries
By using the info provided and a Maus icon you should be able to model the E100 in fairly accurate manner.A
Panther F icon should be good enough for the E50, but for the data you will have to to make some speculation on the basis of the Panther II.I guess that with some Marder icons and some speculation some of the lighter tank destroyers could be modeled.
Here is also a link on the E25, although no icon will be a perfect match.
http://www.lexikon-der-wehrmacht.de/Waffen/E25-R.htm