I am pretty sure induction cook tops are controlled in a similar fashion to a simmerstat, ie. either on or off, and that will not work for a still boiler.
I have one. $28 online in oz. Set it on the cake heating setting and you can control the temp. Im only doing 5-6 lts at a time and it has it on the boil in 15 mins. Its a 5-Star Chef mod. CT IN 739A