Re: Websites for buying building materials
Go to batson's site and under technical forum they have pdfs for suggested components for their blanks. You can buy all the stuff listed or use it as a guide for customizing the rod.
J stockard is a good site as is utmost enterprises (discount on batson stuff), others include acid rod, mudhole custom tackle, cabelas has some, bingham enterprises, golden witch and ye older English fly shop. Love getting reel seats from David Winslow rods and decals from Charlie at tight lines custom rods. Those are some places I like.