Arnold, it's there. You've got to scroll aways because those folks have a boatload of customers. Ray got his sequential tail lights from them.
One of the cheaper ways I can get my on hands on a kit, is I could go down to a yard and find one in a old T-bird.
If the ones in old T-birds are anything like the ones in '67 Cougars, you'll give up before you ever get it working.
I know a guy that has converted over to sequential lights on a couple of cars and he made me out a instruction sheet to follow. When installing them. But I would probably have a little trouble finding one that works right, being that old.
Believe me, it's not worth the effort to try to find the old ones, much less get them to work. The kit from WebElectric was only about $70 and comes with complete instructions. It's also very small and easy to conceal, unlike the old T-Bird and Shelby units.