Kiwami has a few padded briefs left, Nero color has three sizes left.
https://www.kiwamitri.com/padded-mako-p/makop.htm
For my bikes to ride to the beach, I bought these padded bike seats instead and just wear a pair of denim short-shorts over a thong
https://www.amazon.com/gp/product/B009O0CZYG/