Snap-on recently announced these new ultra low profile offset screwdrivers. They’re available in slotted and Phillips #1 and #2 styles, and are about the slimmest offset screwdrivers I have ever seen.
If you don’t care what it says on the handles, you can get a 3-piece Anex screwdriver set for $20. Snap-on pricing is not yet available, but I’m sure you’ll pay more for the Snap-on Industrial branding and service. Snap-on and Anex drivers are all made in Japan.
Buy Now(Anex Set via Amazon)
With bit heights of just 10mm, these really are about the slimmest low-clearance screwdrivers out there.
If you can work with a slightly taller tool, Husky’s combination offset screwdriver is a good buy at just $7.