For long swords, I have a much smaller choice because longer lengths of rare wood are hard to get. I have most of my spalts and burls stabilized with Meth-methacrylate. I finish all my sheaths with Crazy Glue. It is a much better product than lacquer and much longer-lived and repairable. The tsuka or handle, is wood, covered in fancy grade rayskin, and wrapped with real silk.
All swords come with the traditional menuki.
I also offer the wrap in two types of leather. One is the old style doeskin look and the other is a braided finer and thinner leather. Both styles are presentation grade and not for martial arts usage. Stick with silk for that usage. Tsuka can be had in most any length.