Broken screen, where to get Spare parts?

I recently dropped my Dell Venue 11 Pro and cracked the glass cover. The Screen itself seems to be intact (no damage like discolouring or black areas visible) but doesn't react to touch. The tablet is however still controllable via an external mouse. Does this mean switching the cover is sufficient to repair the damage? If so, is the glass cover exchangeable on its own, or do I have to change screen and cover together? Also, does anyone know where to buy spare parts for this tablet? I didn't find any searching online.

Btw I'm from Germany, just in case someone knows a german parts dealer.

Thanks a lot to anyone who can help me out here!