lemke
Contributor
These are the best that I have found. Not the cheapest or most expensive. I carry them daily, in and out of the water. I have contacted the web site to see if they could source a retention sheath for diving. They thought it was a good idea, but I haven't seen one yet. They have full size and compact size.
CountyComm - Compact Trauma Shears
CountyComm - EMT Shears
I just tie about a 2" loop of bungie cord through the big handle, and just loop it over an old mini-maglite sheath while on my harness. Haven't lost it yet.