Rub rails . com, taco marine and others on the net have several to choose from. For the plastic piece that goes between the aluminum rub rail and the boat under the deck joint I could only find plastic wire mold. here is the link
(Power-Rated Raceway, 400, 800, 2300 | by Legrand
I am in the process of using 4200 to join the flat piece to the side which had to be cut down.