aren't the 28-29 similar to the sedan's
https://www.brattons.com/28-31-sedan...in-gutter.html
He's asking about a 30. I believe those are a different beast altogether used only on the 30-31 coupes
https://www.brattons.com/30-31-coupe-rain-gutters.html
The reproductions for the 30-31 coupe are ok, they are missing one extra bend if I remember correctly. Look at the links above and compare to the profile on your car if the car has one.