Hobie USA does/did supply Dacron 3/8" jib and 7/16" main for sheets. I am using Yale Light 1/4" jib and 3/8" main and have been very happy. I use the factory lengths of 44' main (about right) and 32' jib (may want to go a little longer).

If you have questions about Sampson, Yale or any other line, call Layline in Raleigh, NC (also on the web). They are good folks and extremely knowledgable about line and rigging.