Have you tried Catalina Yachts customer service/ parts department. Go to www.catalinayachts.com and use the general number at bottom of page to get connected to parts department.The spreader is still on the mast that is stepped. If I could find the dimensions, I have someone who could make one. The problem is the outer end is enclosed and I can't see what it looks like. Too old to go climbing up to check it out.