I could only find a 1K to 20K audio transformer, and the schematic says 1K to 200k .. so the out put is somewhere around.. what ? 162v ? how much would that hurt or tingle ??
hm....
maybe a 1K to 10K transformer will give what you want. the voltage is not so big, so i don'y see any problem here.....
i know i tested this 'thickle' you say with a 8Ohm to 32 Ohm transformer from 1.5 or 3 volts...i don't remember exactly.....