Now that our cars are 20+ years old and GM is quickly depleting their stock of replacement parts there is a definite need to reproduce many commonly worn or deteriorated items. This is especially true that the cars are not going down in value nor is their popularity waning. Feel free to add your comments. There are people watching this thread that might answer your wishes. Although some of the items I listed are still out there, the prices people are asking is more than most people wish to pay and the supply of those parts is unlikely to increase anytime soon.
My short list:
marker lenses
head light bezels
grilles
exact duplicate header panels
hood liners
door skins
wheel well moldings (especially the right side ones)
My short list:
marker lenses
head light bezels
grilles
exact duplicate header panels
hood liners
door skins
wheel well moldings (especially the right side ones)