Any charger should work. Some of the really cheap ones might charge slower but generally wireless charging is a standard. The only thing you have to know is that the charging coil in the Razer2 is at the bottom of the phone rather than the middle so the phone can't sit in the middle of the charging pad (the top third of the phone will be off the pad). Docks that hold the phone vertically might struggle but any that lie flat should be fine.
I use an anker charger that I bought from Amazon and it's worked well for more than a year now.