Maybe $100 to alter the shoulders and back.
Frankly, because this is no consultation, there's not a lot of effort into tracking down specific in-store options. Look for brands like Canali, Caruso, Isaia, Pat Zileri, and Belvest at a high-end store such as Neiman Marcus. (Call ahead to see whether the brand and size is in stock.) If anything fits better than the suit above, search for it online and buy that way if it is much cheaper (at, say, Yoox).