I don't think they exist yet. There are a very small number of real UVC LED flashlights out there right now and none of the ones I've seen are in the P60 drop-in format.
Another fluorescent mineral collector here. I've been searching for something similar for the same reason. I have a 275nm UVC LED on a round PCB but a single UVC LED isn't very bright so I haven't fitted it to a host. I bought a germicidal UVC LED wand (FEIT UVC/WAND/6W/LED) and I have a long thin UVC filter that I'm going to fit to it; this will produce a nice linear swath of illumination but it won't have much throw.I've seen a few that are already on a PCB and some bare diodes. I'm hoping to find someone that can make or does make P60 drop-ins. The person I've bought from before hasn't logged in for about 5 years now. Hopefully something will show up soon. I already have one that's around 385nm. The main uses are/will be for showing off and hunting for gem and minerals that react to UV light.