Kiloohmcom was able to mount AGM ASP-Micro TM384 Thermal on his helmet and demonstrates it in this video... "Norotros RHNO II for $40-60 used, there are black aluminum versions and silver titanium version. Also, some come with dovetail socket or more commonly bayonet style which needs modification to be a dovetail socket. Alternatively a Wilcox L4 G24 or Cadex will work as arms.

RHNO II bayonet arms to be modified with a Norotos PVS-15 Socket, AKA2 dovetail mount."

The Tactical Rifleman recommends the FLIR Breach as the best mini thermal camera for all missions. It is a monocular that can be mounted on NVG mounts allowing for hands free use of the thermal camera in tactical situations. Since it is 7.4 ounces it is pocketable and features onboard recording and seven palettes for fast detection of suspects or evidence, day or night.