I havent done this on the bionic but have on the droid X.
cnn.cn uses OEM parts and not knock offs. I bought many things from them for previous devices.
For the replacement, for the bionic, you wil need a T5 torx screw driver. You can buy that sears or home depot and pick up a precision driver kit.
Also will need something thin to pry apart the case since its snapped together. A plastic tool, cnn.cn sells also to snap apart the case or a plastic razor blade will work too. You can buy those at autozone or advance autoparts in their repair section for body work.
Just take your time with it, theirs lots of vids on youtube that shows the disasembly of the device.
Lastly, be extra careful with removal of old digitizer, main frame housing has adhesive tape, which can be reused, just be slow on pulling it off for reuse on new digitizer.
Good luck.