Reims has all the usual stores you'd expect in any major town. The Galeries Lafayette has menswear, womenswear, kidswear and a food hall downstairs, which sells English food at exorbitant prices if you feel homesick.
There is a small shopping centre, Espace d'Erlon, which has a Monoprix downstairs, not a bad bet to buy your Champagne at prices that aren't inflated as they are in some tourist shops. It also has a FNAC the French equivilent of HMV which sells CDs/ DVDs/ and Books, including English ones.
There are two wine cellars facing the cathedral, both of which sell a wide variety of champagnes at pretty much the same price as the maisons themselves, sometimes cheaper.
If you feel the need to buy English or American newspapers, there is a news stand opposite the Gluepot the English Pub on the Place d'Erlon. The guy who runs it is extremely good fun and revels in the chance of speaking English.
