Reading back over this topic, I realise that I never commented on the proposed bus/truck chassis building factory mentioned in some of the posts.  I am fairly certain that the factory was actually built, at the top of Jamestown Road in Inchicore, but as we know, was never used for the intended purpose and subsequently sold to another company.  I believe that it is (was?) on the left side of the road as it veres right at the top end.