Hi Jake,
Don't forget that the Nacra class rules do not require a "non-conductive" tiller extension like Hobie does.
You can get an aluminum, extendable boat hook for about $10. Just take the plastic hook off and put a swivel on.
I have one in my sail tube I can show you.
I used the extendable canvas support to make a tiller extension for may 18sq. it only cost $20.