You can purchase new uniforms from the Frank Fickett Scout Training and Service Center or the online Scout Shop.
We also keep used uniforms in our pack "uniform closet". You can ask a leader email us with your scouts size / rank and we'll check to see if we have anything you can use.
You can find all the information about uniforms on the Scouting America site, but here's a quick summary of what you'll need.
Neckerchief for grade level
Uniform shirt for grade level
Lions (kindergarten) - T-shirt
Tiger/Wolf/Bear/Webelos (1st - 4th grades) - Blue uniform shirt
Arrow of Light - Tan uniform shirt
Insignia
"711" Unit number patches.
Optional Items
Neckerchief slide. You'll need some sort of slide, but it doesn't have to be the official one for that grade level.
Pants / Shorts / Skirt.
Hat
Socks