A lot of PCBs are actually available upon searching the forum. When a vendor (Like Gon, LZ) design PCBs and sell them via GB/store-front, they are generally not available, and understandably so, as they vendor's motive is to sell them for a profit. However as I said, there are a number of open-source projects, like the GH60, Ergodox, JD40, GHPad. There are more in the works.
I have a number of free to use stacked cases, if anyone needs them, although they might need some modification.