Cal 34-III, rub rail profile?

the rub rail on my Cal 34-III is white, chalky and nearly eroded thru in a couple spots. im sure someone must know what the profile number is and where it can be purchased. do you happen to know how many feet it takes, and what the cost is? I want the black rubber and not white stuff again. the white does not seem as uv stabile as the black. are there any tricks to getting it to lay in right so it looks uniform, tight and without bulging in spots like some of the installs on a few of the cal 20's I see locally. the rail profile for the 20' boats seem like its too small for application on a 34. thanks for the help...