Question on old content for getting a mount that seems cloudy

So I’d like to ask about The Oculus Heroic and the mount you ‘used to’ be able to get from random dungeon finder, the Blue Drake. Is it impossible in Classic to get that mount? Obviously there wasn’t RDF in WOTLK and still isn’t in classic… you can solo the heroic dungeon easily now but, you can’t get the bag that would have the chance to get the mount it seems.

From looking at Wowhead the responses are all old and mixed, some say you can get the Blue one from 10 man Eye of Eternity, some say from 25man, along with the similar Azure Drake. Some comments however say it was removed from Eye of Eternity and only drops from the Heroic dungeon RDF. But they’re all old comments so I’d just like to know before grinding anything else and wasting hours where it’s possible to get the Blue Drake now in classic, if anyone has an exact answer. Thanks!

Should be, I farmed that in Cata (original) I think it was.

There was also one from the bag generally awarded to tanks / healers. That one I got in Wrath actual. not sure if it is farmable or not.