You have lots of options if you want them manufactured, especially if you do not mind going composite. Check out the ChipTalk Store and look at the Chipco Egyptians to get an idea of how detailed and colourful you can get, the sky is pretty much the limit but like it has already been said, the price is also sky high.
But I am intrigued with your notion of a Roman chipset. While I know little of the Roman empire, my favorite books were 'I, Claudius' and 'Claudius the God' by Robert Graves and they dealt with a lot of Roman history which I found fascinating.
