Where is the graphite.png file?

Hello. You mean you can't find the PNG file after you have downloaded them? or you can't download the files? If it's that you can't download the files, it's because of a website update and the bugs are still being fixed. Sooner rather than later the devs will have fixed the problem, so hang on tight. In the mean time try reloading the page a few times, I've heard that works sometimes. Sorry for the inconvenience.