L29 Elec (initiated version) is still in, but in short supply, new thunderflash L35? out soon (October/ November I believe) there has recently been an ammo roadshow, any G4 gurus about? who can confirm or correct?
Engrs can put Batsims in but you can't chuck them around, and the leadtime for getting explosives and accessories is anywhere between 6 and 12 weeks.
Engrs are pretty busy at the mo but you could fall lucky or get someone on the All Arms Battle Noise Safety Supervisors course.