I've tried a couple of experiments, and found that the digitiser needs to see a flat, semiconducting surface of between 8 and 12 mm to register a touch. As well as a human finger, I tried to use the end of a Biro tube with an 8 mm - wide strip of electrostatic-shielded bag material (translucent, shiny plastic with a thin coating of nickel or tin) taped to it. The end which touches the screen and the part you grip with your fingers needs to be clear of tape.
The shielded bag can be obtained from someone you know who works in the electronics industry.
I also found that items with high conductivity (solid metal) such as aluminium rod of any size do not work; it needs to be a semiconductor. Graphite may work (I haven't tried), but is likely to be messy.
It looks clumsy, but the charge is concentrated in the very centre of the end, and the results when using the 'stylus' with MS Paint are surprisingly good, for something which has no real cost to it (just ten minutes of your valuable time and some scrap plastic). I have a screen protector film on my 1010, in case that matters.
If I find a better (free) solution, I'll update.