POM looks like it will become extinct as several keyboard makers in Asia have been transitioning to PBT. It would be a shame if the reasoning is because the POM tooling is EOL.
I know this keycap material isn't for everybody but it hasn't been given a chance with a wider audience. I've begged and pleaded with Imsto, qtan, Boilermaker, Originative, ShakeR - basically anyone who has connections inside Asia who can bring some stateside.