Check out the VOOPOO Argus AIR Pods (2-Pack), encapsulating an integrated pod cartridge and replaceable coil cartridge with 3.8mL capacity.

The Argus Air Pods are offered in:

-"STANDARD Cartridges" with REPLACEABLE coil (coils sold separately) for this version.
-"Pod Cartridges" comes with built-in 0.8ohm coil that is NON-replaceable and non-removable.