Does weblogic store the compiled servlet source file (.java file) for JSPs anywhere on the server?
Look under your application root in WEB-INF directory. There's usually a long name beginning with '_tmp_war_XXX', under the latter there's a directory jsp_servlet, under it - java files, whose names are created as '_' + page name.
Of course, you need to make sure you enable the keepgenerated flag in the weblogic.xml web application deployment descriptor. See:
Hope this helps,