Is there a quick way to get a matching set of source for these ten jars included with MyEclipse?
No, no quick way. The JARs were all from JBoss, so JBoss will have source for some of them, but you may need to dig for the source for others that aren’t from JBoss. For example activation should be from the Sun site, javax.* and jboss.* should be from JBoss, mail is from Sun (JavaMail), namespace I’m not sure and xml-api is Xerces.
What versions of all these I’m not sure.