I was just thinking about this idea. i am sure it would look awkwark "sp" but it might be cool, kinda lika a turbo head. What do you think, i have no means of making an adaptor.
I have both lights, so I just checked it out, and my personal opinion is that such a mod would be much, much more trouble than it's worth. If you want a light with a beam like a Survivor or Survivor LED, just buy a Survivor or Survivor LED.
The LA for the ProPoly includes the reflector, emitter, and electronics all in one. Even if you could somehow remove the ProPoly's stock reflector, it would be a nightmare to get the Survivor head to properly connect with the ProPoly head.