Karen - There are a lot of options but let us zero in on what you want. Are you looking for wood clad and how do you want it to vent? Size would also be very useful as many times there are size restrictions on archtop venting windows.

Hi eastbay. Interesting....are you in newengland? I am looking for a 24 or 30 inch round window not a circle top. I need to replace two octagons. Vinyl or fiberglass exterior and wood interior. I have only seen brickmould primed by brosco. We are only 75 Feet from the bay and these windows are 20 and 30 feet up. Painting the exterior isn't and option. Push bar type hardware seems be how the are made.

None of the fiberglass companies make one that I am aware or, the only option I can think of are either Marvin Signature Series and or Parrett Windows.

Marvin was next on my list. Never heard of Parrett, but I will look for them.
Thankyou.
Karen