Replace with a Stainless Steel Mast Tabernackle
You may want to think about having a Stainless Steel hinged tabernacle plate installed on the bottom of your mast and do away with the sheave on the bottom of the mast for the Jib halyard, if you have internal halyards. The Jib halyard can exit through the mast next to the Main Halyard. I had this done years ago when I lost my old mast, and it worked out beautiful for me. I mounted the tabernacle plate on top of another stainless Steel plate w/ holes in it for accessories and etc. on a piece of teak where the old mast tabernacle was. Of course, if you want to go with the original mast tabernacle, Rudy at D&R Marine in Assonet Ma. might have it.