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To enjoy more silly standards, you could always change your freehub to one that takes a 10t smallest cog
But really the square taper Spa cranks idea is the best (apart from just paying the money for the middleburn chainring). BB length adjustable to give you whatever chain line/chainstay clearance is the best compromise. I have the Spa cranks on my all road type bike and zero complaints
I needed 165mm too, and as above, cheap 110bcd narrow wides are easy to find
Get the BB shell reduced.