This Old House, thisoldhouse.com ,is by far one of my favorite resources for home improvement. They publish a list every year of the annual guide on where to get unique &
hard to find items for the home. Here is a peak.

Ceramic Tile
Each piece has slight variations because it is handmade. trikeenan.com
Lighting
For 60 years this shop in the French Quarter has been quietly producing lighting for the area's finest homes. bevolo.com
Fireplace Mantels pearlmantels.com
Stair Parts crownheritage.com
Salvaged Lumber urbanhardwoods.com
For more visit: thisoldhouse/secret-sources.com