There are smaller. I’d it’s one of these. https://www.amazon.com/0-028-Screwdr.../dp/B01M6C2E3X

Or in MM. https://www.amazon.com/7pcs-set-0-71...1M359D1G&psc=1

Honestly though, in those ultra small Hex sizes they are nearly the same fit. But like I said, you should be able to find one of those little Hex bit Driver kits with the ultra small sizes. Like a “mini” kit. I’ve picked up a couple at various retailers. Now that little trigger shoe is plastic right? Worst comes to, just melt it off. Try a a soldering iron to melt the plastic around the screw bosses.