Ok, I found exact replacements at Rig-Rite, not cheap but they are 33% heavier than the originals (I weighed the old and new).
NG1-3 (50 mm) $22/each and NG1-4 (60 mm)$32/each.
Not cheap, but do you really want to unstep the mast or climb the mast to fix a sub-par sheave solution?
NG1-3 (50 mm) $22/each and NG1-4 (60 mm)$32/each.
Not cheap, but do you really want to unstep the mast or climb the mast to fix a sub-par sheave solution?