The troopers in the Clone Wars were clones. The stormtroopers in the original trilogy aren't clones.
The Stormtroopers in the original trilogy certainly include the clones from the Clone Wars, but you're right that there are other Stormtroopers at that point, too.
Not to get all hyper-nerd on you, but no, the clone troopers are all out of service by the original movie. Mainly because the rapid aging that let the army be raised so quickly made them all too old to fight within a couple decades.
...please don't make me post a Wookiepedia link to support this.
I'm not going to outnerd anyone on SW (I'm more of a LOTR guy), but wasn't that an expanded universe factoid?
I'm pretty sure the current Rebels CGI cartoon is considered official and it was primarily from there.
...btw, not a bad show overall, definitely for a younger audience but not all that "kiddie". Some likable characters and interesting plots.
They've actually done a pretty solid job filling in some gaps from Revenge of the Sith to New Hope.
It's definitely not that "kiddie" based on some of the plotlines and stuff going.
Also, the expanded universe stuff pretty much got chucked out the window when Disney took over and, basically, Disney is stamping what is canon outside the 7 films. The "Rebels" cartoon is canon.
Although, you can certainly see some concepts from EU novels being used.