I used to work at LEGO (on their video games) and while there we had access to some of the cooler bits. For example, a while back, I was able to make minis for all of the players in a pirates Savage Worlds campaign.
LEGO is now releasing a series of collectible minifigures, and recently a spate of Roman-themed figs has come out. While I probably won't actually use these in my running of Arrius Lurco, they're fun to have on hand during the sessions.
Warning, spoilers below if you're a player in Legacy of Arrius Lurco!
A senator/emperor and his Praetorian guard:
A group of gladiators:
A siren (Naufractus) and the Minotaur:
New Miniatures for Invictus
Wait, you mean, I can buy these now?