This topic is to give you the name of a very professional French company with high skills in the transformers manufacturing: CME-HEXACOM.

This company can manufacture true custom audio high end transformers, including the "EI" or "UI" types (not only the toroidal types), and reaching the "M6X" level of quality, meaning grain oriented plates and OFC cables.

You will have to pay by bank transfer (as credit cards are not accepted for the time being), but I assure you that the quality is outstanding, as well as the musical results, compared to the standard toroidal transformers that we find in 99,9% of our devices.