Neudorff replacement clamp DuoTherm 530 ltr

This is a replacement part for a Neudorff Duotherm 530 ltr composter. But it should be compatible with some other Neudorff Composters also.
I designed this, as I lost a few of these clamps during a disassembling of the composter. Replacement parts from Neudorff are in general available, but unfortunately nowhere in stock.