Also, where can I obtain a short bokken? I know I could always modify a regular-sized bokken, but that seems like a waste. And does the tip of the short bokken need to be of the "pointy" kind, or does the blunt tip (like in the bu-jin and Iwama-style bokkens) work?
Any suggestions are apreciated.
Check out Kingfisher Woodworks. They offer a short sword, and do great work. I bought a beautiful custom jo from them last year and am very pleased with it. They might be a little bit pricier than what you're looking for, but I thought it was worth it. They're at: