Hah, don't make me an 'authority'! I see what you're asking now: specifically things that are only available as cyber. When you said 'eyeware', I read that as 'thermo vision, etc.'

Voice modulator. Hmm. Something *like* that should exist, even if it's not in the books. I think that certainly qualifies as Special Equipment, using the cyber prices (typically, external gear is much cheaper, but this is 'special'). I'll check the books real quick.
Edit: Back. In this specific case, you don't need a Voice Modulator (hardware). You just replay a recording as normal.

That's all the Voice Modulator does anyway, except for the Secondary Pattern system. *That*, IMO, is easily a software thing, that you could buy (expensive and forbidden) for this purpose. Pretty sure that's house rule territory, which is fine. That's what they're for.