Sigma Pi Fraternity's On-Line Store The On-Line store no longer exists, please contact the Executive Office to place an order (800-332-1897). Officially Licensed Vendors Want something not offered in our on-line store? Check out these officially licensed vendors for more awesome Sigma Pi Merchandise. Clothing and Apparel If you need a new set of letters, or simply want a cool Sigma Pi shirt then you need to check out what's available online at Spirit Recognition. Greekgear.com If you need Sigma Pi clothing or gifts, check out what's available online at Greekgear.com. Student Sigma Pi Credit Card Apply for the Sigma Pi Student Visa Card through Bank of America. Billing Services Billing services like APH and Omega Financial assist fraternities and sororities collect dues, budget funds, pay bills, and provide account services. Greek Creations Greek, Fraternity & Sorority Merchandise. Shop for T-Shirts, Glassware, and Paddles.