In Los Angeles? What kind of home decor? Price range?
Consignment store: Unequities, Beverly Hills. Love this place!
Fabric: Home Decor downtown, Wall St.
Cheap: Living Spaces, Olympic Blvd. Mid City.
Upholsterer: Steven Anothony
Lighting: Foundry on Beverly Blvd. & Lamps Plus!
Interesting Stuff: Arte de Mexico, North Hollywood
Hope that gets you started! There are always the chain stores, Pottery Barn, Restoration Hardware. If you have a resale license or contact an interior designer, The Pacific Design Center and The LA Mart are the best sources.
If you are willing to drive, Mathis Bros. in Ontario has everything under one roof!