You could try creating a new entity manager from the entity manager factory, and try loading objects using that manager to get the database objects.
I think you can do it as :
@In private EntityManagerFactory entityManagerFactory;
I believe the entityManagerFactory is created as an application scoped seam component.
To create a new entityManager you can call createEntityManager() on the factory object.
Alternatively define a second SMPC in components.xml from the same jndi lookup for the Persistence Unit factory.