Salvete,
Years ago, I slightly modified Europa Barbarorum's Romani.
Put simply, it added the Eagle-Bearer (aquilifer), and a different texture to the First-Cohort's/Praetorian Centurion.
This can be quite fun for those who like to track certain individuals/roleplay etc. :)
It also adds a 'lion' headdress to the standard bearer, which was unique to the aquilifer.
The Primus Pilus' distinct armour and shield marks out the individual's status within the legion.
I believe the textures I found seamlessly fit into EB style:
Let me know if you guys would like to download, and I'll try to post a link! (probably in the comments)