I have already suggested that you contact Intact Audio. Another source for a proper transformer would be Jensen in California. They may be able to custom build you a SUT with a high enough turns ratio to accommodate your MC2000. (Or maybe they even make one already; check their website.) As I mentioned to you, I am using mine in a Dynavector DV505, with a lightweight CF headshell. Results are satisfactory, but I don’t know if they are optimal as I have not tried other lightweight tonearms. Gordon Holt in his original review back when pointed out that the weight of the cartridge itself, combined with its high compliance, meant that you optimally need a 5g tonearm for best resonant frequency. Not too many tonearms fulfill that strict criterion, maybe an Infinity Black Widow or one of the lightweight ADC tonearms. The theoretical problem with the DV505 is that although the vertical effective mass is at least in the right ballpark, with a light headshell, its horizontal effective mass is much higher, somewhat like a typical SL tonearm. Anyway, your MC2000 will certainly "work" in the DV505 for the time being at least.
By the way, the MC2000 is also a good candidate for a current-driven phono stage, which might not cost much more than a custom SUT. Curent equals voltage divided by resistance. .05mV/2 ohms = .025mA. Some other LOMC cartridges commonly used with current drive don't make as much current as the MC2000. You still need lots of gain, though.