Looking for basic soldier and Centurion items

[Flavivs Aetivs]

Well if you're in Texas I believe M. Demetrius is in a group in your area, you should talk to him.

I'm with the 6th Legion in SC and I can say Soul of the Warrior is a reliable supplier from my experience. Rusty is a good and honest guy, but he's really busy because of his job. He'll get back to you, I'm sure of it.

I think Imperium and KOA are defunct, but I don't know for sure.

Armamentaria is also an excellent supplier, although I've never ordered from them, but they offer a wider range of Roman-Era gear than SOTW as well in their gear.
Al-hamdd and DSC are good too, but I haven't ordered from them before either.

However, the Imperial era extends over a very large timeframe. What period specifically are you looking for? As the Army changed in appearance significantly about every 100 years.