There is a shop in Buffalo, NY that deals in traditionally styled clothing called O' Connell's. They have everything a fan of traditional American sartorial sensibilities could ask for. However, I know some people might be on the fence when it comes to dressing in this style simply because of the lack of flair sometimes believed to present in this aesthetic. Take a look, you might be pleasantly surprised.
I want to point out a very vibrant example of the 3/2 sack suit. It is a very beautiful lightweight Super 130' s Samuelsohn with purple chalk stripes on charcoal . When paired with a white shirt and a purple polka dot tie you will be anything but stuck in the realm of the sober. Wearing sack suits may not be everyone's cup of tea, but I really enjoy the cut and feel, as well as the traditional linkage. Give it a go!
The more I look at this suit, the more I am enjoying that purple chalk stripe!