BuyDig.com has the Deco Gear Camera Sling Backpack for Cameras & Accessories with Laptop for $47.99 with free shipping.

• Designed for the Traveler
• Multiple Functional Storage compartments
• Choose between left sling, right sling, or both
• Padded laptop compartment (up to 15.4-inches)
• Fits its one DSLR camera with attached lens, plus several other lenses, flash, and numerous accessories