The Brooks Brothers double breasted Country Club blazer is available at 20% off for the next few days. More if you apply for a BB Credit Card. You can see a photo on their web site. It looks like the Country Club is an upgrade from their basic summer blazer.
They are not as often seen, of course, as single breasted, but they are all over the place among high-end men's makers. What price are you looking for? Luciano Barbera and Brioni make beautiful examples.