Torrance is a California based steel window company and Dynamic is in Canada on the western end.

Talk to Fred. one of the owners of the Window and Door Shop on Industrial in the city. You should know that new steel windows are not a big item in San Francisco. Once you get a price and look closely at energy efficiency, generally you will seek options. If you like the look of steel, fiberglass is a good alternative for the narrow frame. French casements are available from companies like Marvin which is an aluminum clad product with a wood interior.

Good luck!

Arcadia Custom makes a Thermally Broken Aluminum in a Steel Replica as well. They are in California.