Here are a couple of resources that hopefully will help...
Stucco Guru site has lots of info and drawings
http://www.stuccoguru.com/resources/...m?resourceID=3
BC Wall & Ceiling Association has done a lot of work on stucco and flashing
http://www.bcwca.org/
Imasco is a major stucco manufacturer and has an Information Request page on their site
http://www.imascominerals.com/informationrequest.html
If none of these lead you to an answer, let me know and I'll try and come up with other resources.