Thanks a lot for your help, but 3Cworld just restocked the Zowie FK on amazon. I sent them an email asking when they expect to restock the FK and they responded within an hour with this:
Just re-stock in amazon. Please check it after 10 mins
@Xicu, the four mice (including the FK and EC2) will arrive next Friday at the earliest, just so you have an idea of when I'll be able to get back to you.