I have a friend, Don Green who makes sheaves and bushings.

Actually he has been making all sorts of parts lately. His BoomBrake has been featured in Sailing.
Check out his website.

Merimarine.com

and

http://dreamgreen.org/merimarine/custom-sheaves/mast-boom-sheaves

his email: support@merimarine.com


Graeme Nichol
Skimmer
OBYC