Hobie 18 jib on a Nacra 5.7

I was recently the lucky recipient of a free Nacra 5.7. I'm looking for a jib and can't seem to find too much about the size. Does anyone know if a Hobie 18 sail would work. The 5.7 is roughly 18 feet long. Any help is appreciated.

Thanks
Keith

I believe the Nacra sheets from the front x-bar and the H18 sheets from tracks along the tramp, a gennoa in reality as it extends beyond the mast. I say it will not work without alteration.