For my scrapi, I'm saving up for leather for sure, but still not sure about the design.
I was thinking something that would allow it to be drawn the way a samarai sword is drawn. The sheath would need to slide some so I was thinking sheath with a narrowed section to give it a defined area to slide and a belt loop with an oval ring to retain the sheath.
Then again, I don't plan to trek around with the scrapi. Too hard to explain why I would carry that to a park ranger or LEO.