Dave,
I bought a set of ceramic screwdrivers about a year ago, from Amazon. The best thing I can say about them is that they were inexpensive. They are also very cheap. They do, however, get the job done, and I don't worry about breaking or losing them (as I said: inexpensive).
Somewhere, in my mess of a lab, I should have some ceramic screwdrivers that I bought back in the early 90s, and those were, if my memory is not betraying me, much better made than the ones I bought recently.
I also have a couple of sets of TV trimmer tools, some old, some new. They are all quite cheaply made, but they also do the job for which they were intended.
I like Tom's suggestion to construct your own from bits of FR4. I think I even have a couple of old non-conductive screwdrivers that are basically that; the shafts are made from fiberglass rod. Making your own is probably a good plan, as the ones I have seem to have aged poorly (maybe I need to reshape the tips, which appear to have lost their corners with use).
-- Jeff Dutky