We originally had purchased these metal corbels through Home Depot online, but now they are only available through http://www.architecturaldepot.com/metal-corbels.html. We used the "Nordic Arch" Style. Each corbel can hold 110lbs.

You might even search for "Wrought Iron Bracket" on the Architectural Depot website. They are a little more rustic looking.

who mfg the oven hood? what is the cost? what are the specs?

The island range hood was an existing fixture of the condo when we arrived. We are not sure of the manufacturer or cost of the hood. Any major appliance supplier in your area would be able to help you find a similar hood if you brought in a picture of what you are looking for.