Why not contact George Kaye. He probably designed "IT". The # I have is (212) 779-3713. Otherwise, run a search on George Kaye Audio and you should get his web site.
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Contacting George Kaye is probably the way to go.
I have a Super-It phono stage that my tech is currently working on, but it has a outboard power supply that the previous owner had made (custom wound toroidal transformer, 20,000 mF filter capacitance, etc.). I could try to get the specs on this power supply if you think it would be of some use. If interested, please contact me at: firstname.lastname@example.org