We love the light fixtures selected for this project as well! Unfortunately we did not spec them and therefore do not have the source. I will have to direct you to the interior designer Ann Braaten for that information, you can find her page on Houzz.

This fixture is part of the Gaslight Lens collection at Restoration Hardware.https://www.restorationhardware.com/catalog/category/products.jsp?link=GaslightLensChandelier&categoryId=cat6970052