The stock mechanical retracts that came with the Hurricane were underperforming. I replaced them with the main retracts that normally come with the Freewing Avanti Jet. They fit pretty well with only moderate fiddling and fussing with the mounts. One of the great things about these retracts is they are very inexpensive. Only $50 for the set!
If you are looking for retracts for a project, check out MotionRC.com. They sell the retracts for nearly all their models. You can find all sorts of sizes, configurations and styles. – Steve B.