Hey there, Stare. I apologize for the wait on this. It looks like Breaker has everything summed up but the sheath.
This is what I come up with for the sheath:
Custom Eklan Sheath w/ retrieval enchantment
Description- Custom Eklan Sheath split in the middle from sori to hammon with four carved nooks to hold sori of the katana in place leaving sharp side of katana exposed w/ a retrieval enchantment for easy mounting.
Price: 600 GP
Please let me know what you think.