They do exist - I have seen RLC Bomb Disposal units wearing them on their specialist operations. If you contact a bomb unit I am sure that someone there will be able to provide the information you need.
They do exist. Bunch of blokes (and couple of girlies) been in my station a few times in the fairly recent past. Issued to R.E.S.T. I believe for certain jobs in this part of the world these days. Obviously an NSN out there somewhere.