It's been a bit too long since my last batch but I wouldn't exactly say the cards are unobtanium. Between myself and https://jcm-1.com/ we have 1000 cards currently in production that will be available in the next few weeks. Getting more sellers lined up outside of the US is in the works as well.
BTW I haven't used PCBWay because they aren't very competitive with their assembly costs. I don't think making the design available through their shared projects makes sense, either, since those would be small orders. If someone were to order 10 boards for example, it'd cost about $100/board. PicoGUS is cool and all but as the creator and knowing all of its warts it is not in my opinion worth $100.