The Tv-Asahi site is taking a long time to load, but at least the Core Driviar-TH one is real, so I guess the other ones probably are too. The source is the spec page for the Riders or equipment in Tv-Asahi's site. There's a lot of technical information for every single tv show Rider, and usually little is translated.
There's even more untranslated information for the TH one even (the "Driviar" are "Gravity Drive Engines", and the TH can both generate high energy for projectiles, and rotation and vibration of the engine it can emit a wave that cancels Density Shift).
Aaaah, I see! Thanks for the clear-up!
He may have wanted to destroy them before 001 could roll out the new Viral Cores. Maybe Gou knew that once humans started using them, someone would inevitably find out his secret
But how will they find out about it? He would have to change into a Roidmude in front of everyone or be seen by a camera. But that makes me think.. What if Gou was able to get a prototype viral core and fused with a Roidmude? But somehow he still gets to control it, like keeping it in stasis or something like that. Maybe Prof. Herley could be in this as well, hence making the Mach Driver stronger, but non-usable by a normal human. Damn, there could be so many possibilities, but they haven't really hinted anything notable yet..