I bought one... glass lens, plastic reflector.
No pics, but:
It will take a 17mm driver.
It will take any LED on a 16mm PCB.
On mine, the driver sits a bit deep, so I had to add a ring of solder around the negative contact ring to make contact when the battery tube is tightened.
Protected cells fit.
Good thermal path as the LED doesn't reside in a pill, but a flat shelf that is a piece of the light.
The pill shelf is flat, so you would need a good adhesive to center and retain the emitter. Although, there is a divot in the middle of the shelf, directly under where the LED PCB will sit. I used a file, followed by lapping the shelf smooth to machine out the divot and make a mirror-polished flat surface for the PCB to sit on.
Reflector is an oddball size, I haven't been successful in locating a good aftermarket reflector or TIR optic.
I was able to use a rotary tool to slowly sand the reflector opening to fit a standard XML centering insulator. The emitter sits deep in the reflector, but is well centered, and at a good optical depth (die surface is completely visible around the full surface of the reflector).
Mine now has an XM-L2 emitter with the 2-mode DD-High driver from FastTech, running 14500s. With fresh cells it is very bright, but extremely floody. This light also gets very hot very quickly. With good (better than my two-year-old Trustfire) cells, I can see this light getting so hot that you would be unable to turn it off without getting burned (danger of a twisty).
It's a cheap host. During my mod attempts, I accidentally and destructively dedomed three XM-L2 emitters trying to get the reflector centered, before I got it sanded down to the right size. I kept working on it though, and finally got a working light. I would prefer it didn't have the keychain loop. Compact, ultra-budget, single-AA mod host, one of the only I've found to date.