It's not exactly what you're looking for, but maybe it will help or you'll like it.
I bought a “normal T47 bottom bracket” made of steel and then replaced the built-in bearings with NTN bearings. It's important that the BB already includes reduction sleeves so that you can replace the bearings with industry-standard bearings. On a cyclocross bike, use slightly thicker seals for durability, and on a road bike, use non-friction seals for maximum efficiency. I bought a BB from moqaui and bikone, but I think a solid one from Aliexpress would also work, and then you can replace the bearings with good tools. But keep in mind that two good, high-quality bearings can easily cost €25-35 each.
