Back at GamesDay 2001, Carl from Dropship, which alas has not been updated for many years now, put on a most excellent Epic demonstration game with some fantastic models and some fantastic scenery.
One of the key scenery pieces for me was the freight yard, railway track and one of the nice Forge World Tank Factories (which is sadly now long longer available).
In that shot you can also see the very nice (and also not available) Capitol Imperalis.
Sadly this model was never re-released nor was it re-imagined when Epic Armageddon came around (and went again).
I have seen what some people have done on the web, but I do wonder now and again if Forge World will ever release either an Epic or a 40K version or something similar.