Are there no other manufacturers who do POM?
Keycool does but the caps are OEM profile and a tad thin.
KBC used to sell really amazing Rainbow POM keycaps but hasn't manufactured any in a long time - and neither Feng, Imsto, or Qtan seem interested in getting more.
You could steal POM off a Cherry board - but it won't be complete - and they will have lasered legends.
Very very rare. WORTH the wait.