Pro Touring Rear Spoiler

If you can use a set of tin snips and a sheet metal brake you can make one yourself. NASCAR style spoilers for a Dart are a piece of cake, the rear deck is flat and the edge is almost perfectly straight.

You could probably even make it work without a sheet metal brake, but it would look better if you could get access to one...

Here's one on a Dart (not mine! even if we do have the same taste in wheels ;) )