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NotaNuffian
NotaNuffian
假面骑士：从量产骑士开始
This is an unflitered link, you might want to double check or find it yourself: https://www.biquge.tw/book/1141228.html
I believe this is what you are referring, with the whole "mass produce" title.
Also, the "mass produce unit" I suspect is referring to Kamen Rider Mach (量产型假面骑士Mach)
kamenrider.fandom.com
This is an unflitered link, you might want to double check or find it yourself: https://www.biquge.tw/book/1141228.html
I believe this is what you are referring, with the whole "mass produce" title.
Also, the "mass produce unit" I suspect is referring to Kamen Rider Mach (量产型假面骑士Mach)
Kamen Rider Mach Production Model
For the original Kamen Rider Mach, see Go Shijima. The Kamen Rider Mach Production Model (量産型仮面ライダーマッハ, Ryōsan-gata Kamen Raidā Mahha) is a variation of the Kamen Rider Mach suit, with a more realistic-looking motorcycle helmet, additional armor and the Pikopiko 3 retrofitted onto the back...
kamenrider.fandom.com