You can obtain exact replacements in bronze from

Port Townsend Foundry LLC
251 Otto St.
Port Townsend WA. 98368
Phone: 360/385-6425
ptf@olypen.com

Attn: Peter R. Langley

As noted in the "sticky" above, Port Townsend has all the original patterns for early Pearson yachts. Check with them. It might help to give them the Rostand part number as shown in the appendix to the manual.