I have used Tide containers for short races. The old standby of hipity hops work good. You can also use ball shape boat fenders. The big tetrahedrons are the best for long legs that need good visablility and they don't hurt when you clip them at 20 knots. I tried that in mexico just to see what it was like.
Anapolis performance sailing makes a 2 foot mark for $20.
Me = 145lb + 6" + (15M spd3 dlx, 11M x-bow, Kahoona 9.5M, 7.5V2) + Zap skim, home made 133 orange carbon aka Bifrost, home made black 170x50 cabon racing light wind tt, 133 wide tip carbon) + red helmet