These are some of the places I like to go when I am working on miniature kits. Some sell doll house furniture, router electronics. I even include vendors for wood and a laser cutter.
Adafruit
Electronics, kits, instructions, and nice videos. Great site for learning.
Miniatures & More
Fun miniatures shop in Edmonds, Wa
NAME
National Association of Miniature Enthusiasts
Ocooch Hardwoods
Supplier of high quality hardwoods, ready for use in your projects