No such thing that I've ever head of.
Main reason there not avalible is because every one would have to be custom made for the differant pitchs of the roof and differant rafter spacing.
Plus you would need a crain to get it up on the roof.
Any dormer would have to have to have more suppot built into the roof to keep the roof from sagging. Most likly an added rafters on each side and double up headers top and bottom.
Not sure where your getting the sky lights are so 70's looking. There installed all the time to new and old houses.
Main reason there not avalible is because every one would have to be custom made for the differant pitchs of the roof and differant rafter spacing.
Plus you would need a crain to get it up on the roof.
Any dormer would have to have to have more suppot built into the roof to keep the roof from sagging. Most likly an added rafters on each side and double up headers top and bottom.
Not sure where your getting the sky lights are so 70's looking. There installed all the time to new and old houses.