Paper Source - View this location on map 'E-mail, e-vites, e-cards you ve been there, e-done that. Lend your correspondence some off-line heft with a pilgrimage to this epistolary shrine, with its formidable collection of paper, cards, and craft supplies. Initially you may feel overwhelmed, so take advantage of the design-savvy staffers (many of them art school students), the nifty DIY invitation and letter-writing kits, and personal stationery consults all of which can help give your every missive a signature style.' Boston Magazine 1361 Beacon St., Brookline, 617-264-2800; 338 Boylston St., Boston, 617-536-3444; 1810 Massachusetts Ave., Cambridge, 617-497-1077; 45 Church St., Wellesley, 781-446-6900, , Massachusetts Shopping

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