you could scrounge around for an off cut from a section one size smaller. cut off the sail track part and sleeve the top of your mast( about 6 inches).
we used to do this on lower sections of mast. especially around the gooseneck


Brian Partridge
STINGRAY 580 "Fantasia"
A Class 585 "FHARKEN A"


YOU CAN'T POLISH A TURD
BUT YOU CAN ROLL IT IN GLITTER!!!!!