try the chandlery
Ed, Following is an article I found which gives you a guide. The sali loft has spinnakers for a 380 but they seem a little small. This could be due to the fact they are cruising spinnakers not "A" symetrical. On a fractional rig I don't think you want to go too far above the genoa track. On my 35.5 it is just above but I have heard of some going to the top.
Spinnakers
If you are racing, we urge you to check your class rules on the allowable spinnaker size. Some racing classes, such as Lightnings, Solings, etc. have very strict rules. Most cruiser-racer classes use the I.O.R. rule. This rule allows the spinnaker luffs (leaches) to be a maximum of 95% of the square root of (I 2 + J 2 ). The sail width may not exceed 1.8 x J. The spinnaker pole length should equal J. Larger sails can be used, but expect a rating increase. Many boats that do not race like to use spinnakers. The rule of thumb for the spinnaker size is the luffs = I. The foot should be between 1.6 x J and 2 x J. Many cruising boats are now using “Poleless Spinnakers.” The luff on poleless spinnakers should not exceed the I or the full size genoa luff. The foot should be between 1.6 and 1.8 x J. The leach is usually 90% of the luff. No spinnaker pole is used with these “Poleless Spinnakers.”
