Best step up transformer for Benz Micro LP S

I'm owner of a Benz Micro LPS and looking for the best possible SUT .
I have the Lundahl's LL9206 Transformer but i'm looking for LL1933 or LL1931 . Another option is the SAC Thailand SILK Supermalloy MC-step up which is going to be custom for my cartridge . Great option could be the step up from Ypsilon MC10 but is very expensive and never hear of that , Anybody has any experience ? In my system the cartridge sounds best at 370 Ohm load