We replaced our striping last year. It was Navy Blue and Teal; so '90s looking. We replaced the striping with Grey and Navy, and it looks much nicer.
I actually did a How To article on it in Motorboating Magazine - It was published in Feb 08; page 120.
The striping was made by TFX, and I got it here:
http://www.stewartdesign.biz/roll-pinstripe-c-97.html?osCsid=6ea81facd9730a6840c140c358c00cfa
For the upper helm, I used 1/2" grey and navy, separated by a 1/2" gap.
For the hull, I used a 1" navy stripe, then a 1/2" grey stripe, then a 1/2" navy stripe, which built the stripe up to 2".
I could not find a good source of wide multi-color stripes, but as it turned out, the narrower stripes bend around the hull and flybridge better anyway.
The project cost about $100, for both the stripes and removal wheels (which I found was easier for old, brittle stripes).
The removal wheel I bought on eBay, but it is a common auto body item that is designed to remove stripes when they do body work on an automobile.