You're going to have to buy the chainring separately, and you might still struggle to find a solution. SRAM GXP or DUB will go in your BB, as will Praxis M30, so you can pick any of those cranks.
I couldn’t find any 40t+ chainrings. Bought a Miche Primato chainset and a 127mm un55 BB. If the chainset has a 42mm chainline on a 107mm BB, I should get a 52mm on a 127mm BB, no? This should give me a starting point and I’ll swap out the BB with a lighter one when it is all set up.
You're going to have to buy the chainring separately, and you might still struggle to find a solution. SRAM GXP or DUB will go in your BB, as will Praxis M30, so you can pick any of those cranks.