I have a twin tiller kit I've never used. A new one will set you back $214 if you can find one. Feel free to ping me via the Weta WhatsApp as email notifications from here don't seem to make it.

https://www.eastcoastsailboats.com/product/twin-tiller-kit-inc-additional-tiller-extension-new/

https://www.wetamarine.com/news-and-events/twin-tiller-extension-kit-available-now/