running wire and fuel line through deck (gheenoe)

Im curious to see if someone can give me a good idea for running some wires that will come from the rub rail and need to go down through the deck to a switch panel. The deck is honeycomb material and so far I have been unable to find a rubber grommet large enough (1/2" panel thickness) to fit the job. Any other ideas of how to keep water out and not have a mess of wires exposed? It'll be only a short run of about 2 to 3 inches from rail to deck.
Would also like to do my fuel line this way from under the rear deck out the top and to the outboard.

Thanks!

 

I'll follow up on my original post here. I ended up cutting a hole in the middle back of the rear deck and glassing in a pvc coupling. Works well because the inside of the coupling had a smaller diameter that is just big enough for the fuel line to go through and slide but right enough to just barely keep it in place so it creates a nice tidy line to the fitting on the motor.

I also have cut out a small hole on the right side of the deck against the side of the hull for wires to the switch panel. They will be run from the rub rail to the deck in a halved piece of pvc tube also.

Pics can be seen in my build thread in the bragging door section.