A euphuism for junk shop. If you do I bet one of these places will have one. I mean architectural salvage. Before you go make sure you bring measurements from every window, door, cupola and available space in your house. You just don't know what you're going to find, so when you do find it, at least you'll know if it fits.
Nothing compares to the sights and smells of the following places.
A web site, no matter how well designed is a poor substitute for the experience of architectural salvage. Try to make it a point to visit one. Architectural Salvage Inc., these are located in New Hampshire. There's nothing like New England for old stuff. The Old House Parts Company.