Well years ago I went throught he hassel of making some out of 45 basic brass. The problem was that the brass didn't hold up very well to the pressures involved. I got thr rifle cheap because it sat in the local gunshop for years and nobody wanted it.

I bought a couple hundred cases about a year ago. Sorry I don't have any to spare.

If you're really in a pinch you could try to fireform some 376 styer cases (it is merely a shortened 9.3x64). They are about 4 mm shorter than their parent case. It might be worth a try.

Bill