It seems that local 9,3x53R case would fit with some alternations. It´s base diater is 12.37 mm (0.487 in). Rim diameter is too big (14.48 mm (0.570 in) versus 12,33 mm) but it´s easy to trim. Same with rim thickness (1.60 mm (0.063 in) versus 1,15 mm).
The only thing is if the 9,3 mm bottle neck case would open to 10,75 mm ???