With regard to the stock drivers, I’m pretty sure you get them when you get them, and not everybody gets them at the same time right now until we’re done with this transition phase.
Have you subscribed to the Beta channel? Admittedly, those are still beta, but they might have more choices for you.
Preview | SmartThings-managed Edge Device Drivers
Otherwise, I don’t know if there’s a way to request a stock edge driver if you didn’t get it automatically yet… 
Tagging @nayelyz