I’m sure there are many suppliers that can get you the components you need. I live close to and use Mudhole and I’m pretty pleased with them so far. They have some videos also and a catalog of components you can look through and build it on paper and then bounce your ideas off of some of the more experienced builders and you’ll be on your way. I’ve done a few and I’m no authority. I’ve heard of fly rod blanks being used but never did one of those for crappie fishing yet. Good luck and have fun with it.