SB Flashlights recently put their stock of Klarus lights on closeout. The Mi02 is similar in size to the Fenix E01 or Sofirn C01. I don’t think it has a potted driver, so it should be possible to desolder and swap 5mm LED’s.

If I ever see a decent price on one, I’m going to pick up a Coghlan’s micro lantern to put a warm white LED in. The Coghlan’s crank flashlight also looks like it has 5mm LED’s.

Lastly, the Eveready PLED23AEH looks like it could be a decent 2xAAA, 5mm host.