Please suggest Leather Case with USB Keyboard for my Funbook Alpha

Hi Guys,

I need your help in buying a Leather Case with USB Keyboard for my Funbook Alpha (7" inch tablet).
After surfing the whole internet, I found these in my budget:

Maxtouuch 7" ePad/Tablet Leather Case with USB Keyboard

Vizio 7 inch Android Tablet keyboard

Scomp Universal USB 7 Inch Tablet Keypad

My Budget is max 600. Please suggest me a good one. Thanks in advance.