Rauliruegas there are actually some really nice custom options available these days compared to the vintage ones you listed. Transformer cores and such have come a long way in increasing transparency. I would not be over paying for something like Tango, Altec, etc.
Some really nice SUTs from modern winders can be had from Tribute and Intact Audio. Optimized for your cartridge.
Some really nice SUTs from modern winders can be had from Tribute and Intact Audio. Optimized for your cartridge.