Hello Skyraider3D
I have been contacted by the museum in Schwitzerland and they have confirmed, that they have all the manufacturing plans for the Bf-109 E.
They however do not have the manpower to sort the many blueprints and the collection is therefore archived for the moment. They have asked me to come and help if I wanted, but unfortunately going to Schwitzerland is a bit to far for me.
So if anyone is up for it the plans are available...
The museum is called "Flieger-Flab-Museum" and here is a link to its homepage:
http://www.airforcecenter.ch/navy/mainnav.php?langy=d
The museum has a rather nice collection of airplanes including a Bf-109 E.
Regards Henrik