Well, you can make your own (http://honest-food.net/2011/08/02/how-to-make-verjus/), but it seems like more trouble than most of us would care to go through.
Amazon has a couple of pages' worth of the stuff at quite a price range: http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Dgrocery&field-keywords=verjus&sprefix=verjus%2Cgrocery&rh=i%3Agrocery%2Ck%3Averjus
2 Comments
Amazon has a couple of pages' worth of the stuff at quite a price range: http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Dgrocery&field-keywords=verjus&sprefix=verjus%2Cgrocery&rh=i%3Agrocery%2Ck%3Averjus