Additional hardware is made by EMKA and retailed by S.W. Anderson Company http://www.swaco.com, the point of contact is:
Kris Gau
Inside Sales
S.W. Anderson Company
7703 First Place, Unit E
Oakwood Village, OH 44146
Office: (440)232-4415 / (800)351-0380
Fax: (440)232-4188
Part Numbers: 6002-U75-JQ, 6002-U15-KA, 6010-13-KA, 6010-16-KA.
I just bought some Emka 6002-U75-JQ Toggle latches with high opening resistance (without padlock-facility) for a Patronenkasten Project I am working on.