Medicom never releases that info officially... we usually get the "Box of 12" ratio, the "Master Case" ratios, and the chase figure news by monitoring the Japanese power sellers on eBay & Yahoo Japan.
The powersellers usually only post that kind of stuff once they get the cases in-hand, though sometimes they post the "box of 12" ratios a little early.
I think there was only one time that the chase info was leaked before the figures hit (Series 6).