Usually OR Sales & Customer Service are all over a request like this, maybe they have PM’ed you already to hook you up with your nearest OR dealer and the official replacement is on the way, but if not, and you’re a do-it-yourself type, find a marine store that has Samson brand of Dyneema rope, buy a length of their 12-strand Amsteel or Amsteel blue 3/16 inch / 5 mm diameter rope and make your own replacement.
do you still have the original trim line?
are you in Vancouver?
if yes to these two questions i may be able to help you out if no then contact OR again or take the line with you to a dedicated sail or marine store and buy the exact matching line.