I buy one module ads1232 from aliexpress, about $3 CAD, before I get this "red" board. It was broken, as they say DOA, dead on arrival.
I also have a few NAU7802 in my stock, have got them from digikey.
https://www.digikey.ca/product-detail/en/nuvoton-technology-corporation-of-america/NAU7802KGI/NAU7802KGI-ND/2769783
It's in DIP package, so you don't need a board or solder some shitty TSSOP, 24-bits and very close to ads1232 in parameters, sampling rate etc. Don't know shipping and handling policy of the digikey in EU, but try. The point is, you can find 24-bits adc for less than 3 euro, it's shipping and handling what makes it expensive.
I think, arrow.com is offering free S/H for new customer, though they have cheap nau7802 in ssop, but you also can try to use their search engine, see if there is 24-bits in DIP for low price.
BTW, what is your project, is it 24-bits really necessary?