Has anyone actually made a legitimate alphabet key thingy?

[Glamourous-complaint 98]

Hey y'all! I've searched all over the Internet. Yes, even in the third page of Google results. But, I didn't really find anything. I need some sort of thingy to work with when I start translating. The alphabets I've used in the past turned out to be just little fun fake thingies put together by random people. 

This is probably a stupid question, but I'm just looking for an alphabet to use? Did anyone make that? 

Thanks!