Check their catalogue, they have tons of bit drivers too... Precision screwdrivers are usually fixed so they aren't wobbly, and typically such bit driver kits are 70% full of stuff you'll never need. Ultimately, if you do need it, I can understand it is annoying if you have to wait and order extra bits. In your case I'd get a set (or even order individually) of fixed precision screwdrivers in shapes I know I'd use a lot (Phillips, slotted, maybe torx and allen) and some dirt cheap bit driver set for the stuff I might need once in a lifetime.

Or get a full vessel bit driver set, they're still not a lot more than a chinese brand but have top quality...