You will find a lot the other direction, and there has been more research done on that.
But I'm sure you can find some sources for En>Gr.
This comes up with a couple articles that might be relevant:
https://www.google.com/search?q="english+to+greek"+borrowing
You could search those bibliographies for more information.
I do think you'll have to do some of this research yourself, though. Look at specific semantic fields like technology, medicine, popular culture, politics, etc., and see which words are borrowed. You can figure that out pretty easily, but you will have spend a little time on each word. You should also consider using a corpus if you can find one to look at frequency.
Another interesting approach would be to do a survey and ask people that you know whether they are aware of using English words and, if so, which ones.