I've found a few companies that offer replacement iPad digitizers (the digitizer is the glass/touch screen part of your iPad), but I'm worried that they might be different to the official one.

Having broken the glass on my iPad 3 I initially spoke to Apple, but they wanted far too much to repair it ($400!). I then looked into third-party repairs (which were still quite pricey), and then discovered DIY repair kits.
Replacing the glass doesn't seem too difficult, based on the tutorials I've looked at, so my only concern now is the quality of the replacement kits.
Is it possible to buy a repair kit that has parts that are (more or less) identical to Apple's? I wouldn't want to replace the a part with something inferior :(