Howdy,   I've made exactly one crossbow, and I wouldn't quite call it hunt worthy.  Mainly I don't like leaving a wooden produce  at full draw for prolonged times, something you need to do while hunting.  The next one I build will have a commercial steel prod.  Look up Alchem crossbow parts.   Their site has some good plans, not to mention a good selection of parts for building crossbows.  Use their parts or use their drawings as a basis for making your own parts (depending on your metal working skills.)
Ron