Kustom King archery in Merrillville, Indiana is a mail order supply house, that supplies shafting, feathers, etc., as well as "how to" books. You might also get a copy of Traditional Bowhunter Magazine. They have a lot of suppliers that advertise there. when I used to run a traditional archery shop, I built a lot of custom arrows. I started with cedar, but switched to ramin wood, for toughness. I was able to get a lot of high spine weights in 5/16" shafting, and built a LOT of arrows in that diameter for bows from 45-60 lbs.
Mad Dog