Need to fabricate a window to match some existing windows. The windows were build in the 1950.The window have 3/4" muntins. The frame is like Z-bar except it is specifically designed for the window.Anybody know of a supplier? The stuff can be fabbed from flat stock, though I really don't want to go the hassle of restraightening a whole lot of 1/8"x3/4" fabricated bars.