I'm sure long-time CH folks are already aware, but for new visitors to this board and to Paris, I'm cutting and pasting info on his new store:
The tea salon & chocolate shop in the Haut Marais has long been the only place to purchase Jacques Genin’s impeccable sweets.
Painrisien now reports, via Twitter, that Jacques Genin has selected a second location on Rue du Bac, 75007, just next to Des Gâteaux et Du Pain and stone’s throw away from La Pâtisserie des Rêves. The shop confirmed that his caramel butter bombs, pâtes de fruits, and chocolates will all be available, but it’s unclear currently if there will also be pastries and a tea salon on-site. Fingers crossed.