I urge you to use the calculator here to double-check sizing: http://www.abrathatfits.org/brasizecalculator.php.

But to answer the question, these bra comes in both 50A and 52A: https://www.amazon.com/TELIMUSSTO-Womens-Coverage-Wirefree-Non-Padded/dp/B09NDFNLCP, https://www.leadinglady.com/products/the-brigitte-full-coverage-underwire-molded-padded-seamless-bra-5028-blk?variant=32530494226481. And these come in 50A: https://www.ullapopken.com/en/lingerie/bras/lace-trim-stripe-seamless-wirefree-bra/p/790703139-1073, https://www.leadinglady.com/products/the-brigitte-classic-wirefree-padded-t-shirt-bra-5225-wmta?_pos=6&_fid=5d1d301f1&_ss=c&variant=32530477187121.