Electrical Volt controller – are there completely different variations?

I went searching for one other Electrical Volt controller so I can have an identical pair at residence, however each search consequence has a white again as a substitute of the black again like mine? Did it change sooner or later? How do I discover one other black backed one, and why are all of them popping up as white with the inexperienced joysticks? Are there completely different variations/iterations? I purchased mine at GameStop initially