My tablet screen is cracked, but I can't find a replacement.

I have a Polaroid P10 that I dropped a few weeks ago. Needless to say, the screen shattered. Since then I have been trying to find a new screen for it. The exterior screen is in tact, but there are cracks on the inside, and the tablet will not respond to touch, so I believe it's the digitizer or the LCD display thing. When trying to find a replacement screen, I can never find one that looks like it will work, either that or I'm just not that tech savvy. I find plenty of other 10 inch tablet screen replacements, but I have no idea if these will work. Can someone help me out and tell me how I can tell if a screen will work for my tablet, or recommend some screens that they know will work? I would also like to know if there is such a thing as a universal digitizer, one that will work on any tablet.