Okay, confession time -- I like hotlinks.

Not being that familiar with the ACR lights I checked their website and found the MS-2000 Military-Spec Strobe Light is the light mentioned by Montanero; it's the only one that mentions Combat Search and Rescue.

Another option for those looking for something lighter would/could be the Planet Bike Superflash Stealth Rear Bike Light They advertise 1 mile visibility which should be plenty.