Probably not ideal, but reasonably cheap. BCF has boat numbers for 2 bucks for 2. So 12 bucks a sail.
Don't get the white background of course.
Hi Duane
I plagurised this from one of the other posts,
AUS XXX numbers are allocated by Windsurfing Australia though application to the QLD AWA Rep Scott Farley.
Refer the following website: www.windsurfing.org/sailnumber_staterules.htm OR you can make up your own personalised number - eg DWBH
Both AUS XXX numbers once allocated and personalised numbers can be printed by Digital Ink www.digitalink.net.au/
If you've already signed up to a club and have a number allocated, Jesper in WA has a special deal for AWA members:
www.windsurfing.org/files/info/Sail_Numbers_Special_Offer.pdf
I didn't go local for mine but supported a fellow windsurfer. If you want to make it easy just email Jesper at Orth Stickers and he will do the rest. It was just way too easy and arrived in a couple days. Here is his site: www.orthstickers.com/boatsignage
Cheers
Marty