I thought you needed male chassis connectors for it, or is this for something else?
A regular Neutrik NC3MD will fit, but it needs to be rotated slightly. The only male connector that will fit properly is the Whirlwind WC3MQ.
If you really do need a female connector to fit in that hole, the Switchcraft D3F, Neutrik NC3FP(-1), Whirlwind WC3FQ, and Cannon XLR-3-31 will all do the trick. There may be some off-brand options too, but I wouldn't recommend them.
GTD
Brain fart,... it's Males I need. There isn't much room on the mini 6 to rotate the chassis jacks (maybe a 1/16 inch between jacks), so I suspect the mini12 is the same.