There might be some way to attach some kind of retaining device to the grommets and then over the guard. The azwelke sheath is nice and he was pretty quick about getting it to me, seems like it would take a bit of time to do it.
I did talk to Rainwalker yesterday and am looking at a leather sheath from him, I just need to figure out what I want and he said it takes a ton of time and he has a lot of work in line already. Very prompt response from him.