The KMAC2 GB happened, all the Korean stuff happens on the Korean boards. Switches can be bought in the classifieds, the occasional GB here, and you can try 7bit over on deskthority. The prototype run of the GH60 (poker size KB) is basically now, GB for that will start up when the design is proven. No idea if there's going to be a case for that one, however any of the aftermarket poker cases should work, and you can also try to buy a stock poker case from someone that has already replaced theirs.
I ran a stabilizer GB a little while back, but Cherry stabs are readily available from mouser and onlinecomponents. The only problem being the space bar stabilizer is pretty much impossible to source.
Matias is soon to have available their Alps switches in q200 bags, no doubt there will be some boards coming up based on those.