There is nothing else you need, just the outer window scrapper and the clips.

I have the seals in stock, but I don't have the clips.

FYI, although nice to have, the scrapper won't keep all the water out of the door and it is important to make sure that the drains in the bottom of the doors are kept clear to prevent premature rusting.

So whenever I am inside a door, I will vacuum out the bottom and clear the drains if necessary.