missing antlr jar in embeddable EJB distribution

I'm using the latest embedded EJB3 release (jboss-EJB-3.0_Embeddable_ALPHA_5).

I have a small EJB3 app that can currently persist, merge and remove things fine via the EM.

But, when I attempt a very simple query, I get this:

java.lang.NoClassDefFoundError: antlr/ANTLRException

This seems like a silly little problem, and searching on this I've found (mainly in the hibernate forums) that I need to put antlr-2.7.5h3.jar in my classpath.

Problem is - I can't find that jar. It is not included in the embedded EJB3 release (jboss-EJB-3.0_Embeddable_ALPHA_5.zip). I do see a later version (antlr-2.7.6rc1.jar) of this in the JBossAS 4.0.4RC1 distro but its not in the embedded EJB release.