I was going to suggest that the inner bearing race you need is just like many common steering ball bearing races on many, many bikes....with the exception of that lovely knurled area.
With the inside/outside diameters and the thickness measurements you should be able to find a comparable bearing from any number of sources......except for that lovely knurled edge.
Glad you found a machinist to make one..... photos of your beauty as she goes to together, please.
And congratulations on your pending nuptials.
I used to be fast....now I just dream about it.
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'08 910R (Gina), '04 F4 SPR #275 Track Bike (Lola), YSR50 (The Rabbit), '71 CB100 (Lil' Red), '75 RD350C (Orange Bird) restoration project, '70 Suzuki F50 (Baby Blue)