Yes, Ralph Lauren does make women's bathing suits. You can look in Dillard's for them.
Can't help it
Ralph Lauren creates a myriad of suits, ranging from ordinary office wear to tuxedos. Examples include the Anthony Solid Suit, Anthony Shawl-Collar Tuxedo, and the Anthony Peak Lapel Tuxedo.
Ralph Lauren is a famous designer of unisex coats, jackets, suits etc. As far as how he is casual, that question can't be answered, but I would think because of his clothing lines are casual clothes.
They don't sell bathing suits
Many companies and places sell one piece bathing suits. If you are looking for one for competative or lap swimming, try looking at Speedo, Nike, or TYR brands. If you are looking for more fashion one pieces, try looking at Macys or JC Pennys.
Hipster bathing suits are bathing suits with a bottom that sits just bellow the hip bone. Most bikinis are like this, these bottoms show a lot of skin.
Apparently Fred Meyer does not sell, or does not have at this time, any bathing suits. A search for swim suits and bathing suits on the Fred Mayer site brought up no results.
Bathing suits have become more revealing. The children bathing suits have become flashy. Yes, I do think bathing suits are too much for our youth. Yes, there are styles of children's bathing suits that I would walk right by because I think they are too revealing. My 5 year old does not need to wear a bikini.
Pentecostal women normally do not wear bathing suits; but some do.
It is always difficult to find that right fitting bathing suit no matter what size or shape you are. If you are looking for plus size bathing suits in the UK, try this website. http://www.ukswimstore.com/c-5-plus-size-swimwear.aspx
Bathing suits for women can be purchased at Marks and Spencer. If one visits a swimming pool they will sometimes have bathing suits for sale. Amazon also sell them.
You can't there is no bathing suits.