Oh my. Biometric crystal alloys haven’t been around for 7 years. I have grenade schematics on my cyber tech but he’s been a cyber tech since 1.0. I’m not even sure which grenade schematics are still available from the vendor, but looking through both the ones listed under grenades and the ones in my archive section, none require any more of the exotic crafting materials, even the purple artifact advanced v-6 ‘nades that used to need BCAs no longer need them.

You can get blue prototype V-9 series schematics and they use Polished Aluminium Cyber Assembly Components and the blue prototype grade 9 underworld metal Vandinite.