I actually bought two sets of small Torx drivers for the same reason. One set didn’t go high enough, while the next set up overlapped a little. Some of the screws on folders go down to T2. Same goes for some thumb studs. Both sets are made by Wiha (a big name in specialty screwdrivers, as you can see in Ed’s link) and are sold on Amazon. Wiha 26791, ($36) goes from T1 to T8, while Wiha 36296 ($30) includes: T8, T10, T25, T20, T25, T30. These are standard screwdriver format tools, but you might find them cheaper in an Allen-wrench type form, but from a different manufacturer. Both sets are very solid, high-quality drivers, although the little tiny ones seem a bit dainty.
I have two relatively large “variety pack” bit sets and neither include Torx bits smaller than T8.
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