Yeah, I guess they are a bit older. You can probably download them all at Mangatraders.com. They have a whole bunch of stuff there. If you want to know who each of the series is by, let me know.
Oh. I remember the US version. In fact, in junior high, my friends and I were really into the whole cartoon scene (retro cartoons and a select few of the newer ones). One of my friends even had us all go see the Powerpuff Girls movie for her birthday. LOL. And we christened each other with different Powerpuff Girls names (I was Buttercup).