I'm having a hard time finding the (CORRECT) belt moulding clips for my driver's door.

The ones I see for sale are all the same size (same length) and as far as I know, they should get narrower (shorter) as they clip on going forward to the front of the door as the belt moulding gets narrower.

Also, I think there is a bolt that gets a nut on the every back of the door / belt moulding.

Am I correct or crazy ?

Any idea where I can find the correct set ?

Thank You
Mike Nelson