Here is a link to photos of a preserved full-size example on display at the Virginia Aviation Museum. There is also a small 3-View on this page.
http://www.eaa231.org/Museum/E1/E1.htm
I believe the old Harleyford series book on Fighters 1914-1918 (Lamberton & Cheesman authors) has an entry for the E-1 including a 3 view in 1/72 scale or so, some photos and text. Also there is a color plate and some text in Kenneth Munson's "Fighters 1914-1919, Attack and Training Aircraft". The color plate has a side view and a split-plan top/bottom view.
I've often thought this airplane, and other U.S. airplanes in this category like the Orenco and the Heinrich Victor Scout would be interesting model subjects, either flying or non-flying. I remember seeing the Heinrich published as a small contol-liner in an old model magazine (M.A.N.?) from late '40's or early 50's, and the Orenco as a solid-model subject in a reprint of some "Flying Aces" material from the 30's. Can't recall seeing the Standard E-1 presented as a model anywhere, but it could well have been.
Regards