South Bend 13" Metric gears

I have been through the the posts on the metric transposing gears for the 13" double tumbler lathe with 6TPI leadscrew and I am not really finding the answer. The factory set used a 120:127 set but this is huge and almost impossible to obtain. There is someone selling a set of 3D printed gears on eBay but it does not appear to be 120:127 and he states that it is not exact so I assume that it is some other set. The 37:47 or 63:80 work on the other lathes with 8TPI leadscrew. Any idea what the...

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