I used a company called SAC Graphics a few years ago with good results. They had lettering made from a specially flexible vinyl that was suitable for use on tubes.
I think that they advertised in Boat Mart, but I don't have any current contact details for them though.
You could take a look at www.racelinedigital.com they have an excellent website, and althought they do mainly powerboats, Chris Martino does also offer a custom service at unbelievably low prices. They are based in Canada, but it only takes a couple of days by UPS or similar.
__________________
It is better to remain silent and be thought a fool, than to speak and remove all doubt!
Looking at their website they don't seem to do anything different from any other signwriting company - try your local one first - you MAY get a better deal - just tell them what you want it for!!!
here in Athens/Greece we have a very good company that makes logo's and stickers for the hull,the tubes and all that you need.....
try the site: www.grafoartisti.gr
unfortunatelly is in Greek but with a little help (translator) you'll enjoy their work.
They can create anything you want....
