Replacement fan LED light
When they say fixtures are &quot;bulbless&quot;, they really mean it. There are no replaceable bulbs in the fixture.
The reason is simple: LED emitters are the most reliable thing in the lamp... probably more reliable than the enclosure.
The typical failure point in a 120V LED light product is the electronic driver module, which is responsible for delivering a constant current to the LED emitter.  Those go bad  because of cheap construction and the finite life of capacitors.
You've managed to pry out the emitters, but they're really not made to be replaceable because the builder never imagined they would fail.  They are not a &quot;bulb&quot; in any sense of the word; there is no non-proprietary source for &quot;ones just like that&quot;.
The driver, however, is a different story.  You will find an electronic driver module with 4 wires going to it, and fairly easy to exchange.  It will have a semi-standard form-factor (physical shape).  It will have a very specific current output of a relatively standard value, e.g. 350ma, 700ma, 1050ma or 1400ma commonly, and a working voltage range at which it's designed to do that.  If you shop carefully at electronics supply houses, you have a pretty good chance of finding one that ticks all the boxes of form-factor, voltage input, exact current output and output voltage range.
After all, the light manufacturer is not in the business of making drivers; they just grab a commodity OEM driver.