In the day of the 3 cent micro, surely there's something cheaper than a $3-4 GND reference. I tried looking on LCSC and they had multiple voltage references, but the only virtual ground reference they have is TLE2426. I know there are ways of making one out of other components, but I already have a board with a TO-92-3 footprint on it. Hope someone can point me in the right direction. Cheers.