If your looking for items for your impression these are a few stores to look at.

Blockade Runner

Cresent City Sutler

C&C Sutlery

C&D Jarnigan Co Inc

Fair Oaks Sutlery

Fall Creek Sutlery

Mercury Supply Company Sutler

Milk Creek Mercantile 

The Quartermaster Shop

The Regimental Quartermaster 

S&S Sutler

Sullivan Press

Wyatt Reproductions

Tobacco & Pipes