So, Dan confirmed that there will be 1920 cases.
If we take the kickstarter numbers, there are 1530 kickstarted cases, which would leave 390 cases overall.
I don't think there will be that many. Dan needs to hold on to several (i.e. not sell them) in case there are any defective cases that need to be replaced. So, assuming 390 is the number of non-backer cases, I expect fewer than that will be available for sale.