Any korean custom is going to be quite costly. If you want the keyboard relatively soon then your best bet would be classifieds. If you would prefer to have a keyboard to your exact liking then you could always order one from Gon but there is quite a wait on that as well, even if you happen to get in a active group buy now for another board it would still take a while for production and shipment of parts. Kustoms take a lot of time to develop and produce. They are also quite costly because of how small the orders are(Usually around 30-50).