You can find screens now on Amazon, Ebay and Aliexpress. I used Amazon, the screen/frame combo took 2 weeks to arrive.
Please, take my advice: buy the glass together with the screen and the frame in one piece and also make sure the pack comes with the right tools, you absolutely need the prying tools. Yes, it's around 20-30$ more expensive but it will save your day. The screen, digitizer, glass and frame are all glued together. If you buy just the glass, your job is almost impossible. If you buy the screen and the glass, it's doable, but a PITA. If you buy the glass, screen and frame, it's a very easy job anyone can do it. I've used this video https://www.youtube.com/watch?v=hglbDfjFOLE, it took me around an hour and my phone is now like new.