Champion rub rail rope

I pulled the rope off to tighten some screws. now I keep coming up a few inches short, after I get the rope in. Where can I buy some rope for it? 2004 champion 206

http://www.nautiqueparts.com/rubrailandropeforolderboats.aspx

Not sure what color you need. This site sells white 1"x50' for $59

http://www.actioncraftboatparts.com/rubrail/

Black 1/2" .80 FT