I don't want to down the retailers but for the price of two rudder covers and a daggerboard bag, you can get yourself a good used sewing machine and do them yourself. I have done jib covers, boom bags, boat covers, etc, etc.
Just don't let your wife know you can sew as it leads to all the projects she wants to get done.
Dan Kisel
H14 #47876
Tiger #863
F-242 #114
Mirage #336
Nacra 5.0 (pending)