At the top of this page, click on "Links."
Many vendors sell replacement glass for AD's, along with the rubber seals and miscellaneous hardware. Be careful when installing the new glass, it will try to seat too far into the frame (old age, rust expansion, etc.) and leaves a gap between the glass and vertical "cat whisker" strip.
edit: Most of those "wingvent delete" doors are actually earlier doors that didn't come with wing windows. Conversions are expensive and time consuming, requiring metal fab in tight areas. Much easier to go to the junkyard.
