You might want to look for a prop hub from one of the gentlemen on here or from some of the individuals that's specialize in converting small engines for model airplane use.

The prices for the hubs the LHS could get you that fit Zenoah and Fuji engines are a little pricey even if they would fit.

This list of threads may narrow you search a little?

http://www.rcuniverse.com/forum/sear...mitbutton=+OK+