I got a buddy with one of those oddball european things. The closest case I could find was the 32-20 and even it bulged bad at the case head. FIOCHI? list them, but I have yet to get my hands on a box as they are always oos. I'm interested in what you find!
Might put out an international plea as empty cases can probably ship without restrictions, cost is a different story. Also might try Old Western Scrounger.
Good luck, catpop