There's a 1034 member owner's group that appears fairly active. You might sign in there and see what they know about finding parts.
Yahoo! Groups
JO Woodworks makes Puffer rudders and tillers at reasonable cost. They may not be exact by looks, but I can attest his replacement parts I had made for a similar boat function as good or better than the originals.
We still do some custom boat parts such as tables, hatches, cockpit grates on request but now focus on Boat Kits and Custom Furniture.
www.jowoodworks.com