We don't sell the replacement part here, but you can find it online. [https://www.google.com/search?q=Nextbook+8+Screen&oq=Nextbook+8+Screen&aqs=chrome..69i57j69i60&sourceid=chrome&es_sm=91&ie=UTF-8#q=Nextbook+8+Screen&tbm=shop|Here's a list] I found. Looks like it will cost around $25 for the screen if you already have the tools for the repair.
We also have the guide to replace it [guide|39969|here].