In 1968, that bastion of American middle-brow style, debuted its King's Road collection for young men. It's not Chelsea, but it will do. The King's Road fashions are pretty much the high water mark of the flood of "peacock styles" in mainstream fashion. These examples of "total color harmony" are from the spring, 1970 catalog. More to come, I promise!
And here is a TV ad from 1973. Football stars wear them, so you know they are manly!
Need to get your own? There's Ebay.