TOPIC: aluminum j channel

looking for j channel to go on the edge of the deck of my boat. it is not just bent from flat stock , it is extruded , i looked on the web and i can not find the correct size, i will have to measure it when i get home and post the dementions. any body here have a sorse that they use? i need 3 6ft sections. thanks alot, greg (great site you have here)