Sir Ulrich,
If you go with Crusader Monk, but still want a historical scabbard, I would just have him do a leather covered wood core scabbard with a chape. I'm not a big fan of his suspensions, and it might be a cool project for you to do yourself. Crusader Monk gets away with the prices and speed because of the materials and methods he uses. My A&A Black Prince is in a Crusader Monk scabbard, and it's a little on the bulky side, the chape doesn't have much finesse but it's very functional, but I don't really like the suspension, and could never really wear it for Living History.
He does build very sound, solidly constructed scabbards though, and you absolutely can't beat his speed and price.