Hi, Ive measured the mast spreaders, and found out that they are not the same length. The port side spreader is 44, the opposite starboard one is 42. I read Bruce Whitmores article about adjusting the shrouds, but found no info regarding spreaders length Original boat manual does not help either. So...
You can also get them through McMasterhttp://www.mcmaster.com/
Search for finishing plugs.
I believe this would be on page 3551.
You can buy a lots of good stuff through McMaster instead of running to marina store