I originally found mention of these helmets along with a new 1:6 GM-94 grenade launcher mentioned in a BBICN forum thread several months ago but I couldn't find any other information on them until now. Tonight I found a thread on the BBICN that says that the helmets are to be released on 5/10/17...
I found a nice bash over at BBICN. Here is Fire pupil of the tiger's [DIY visual kei] group for a long time SAS, nothing verified, there is no readily shoot light background, a fun map