Ebay offers Blackhawk S.T.R.I.K.E. HydraStorm Cyclone MOLLE Backpack for $97.99 (reg $184) with free shipping.

Product Description:
This BlackHawk Hydration pack is versatile and rugged. This MOLLE pack has rapidly become a customer favorite! NTOA reviewed and approved!
Features and Specifications:

• Drink system protected by Microban® antimicrobial technology*
• Market proven bite valve and patent pending quick disconnect system
• Twin compartments for extra storage
• Large compartment has internal pouch for radio packs and 3 antenna ports with flaps
• Over 100 external S.T.R.I.K.E. molle webbing attachment points
• Anodized D-rings and quick cinch buckles for compatibility with 3-Day accessory pouches
• Reinforced Waist Belt with additional attachment points
• Contoured, padded shoulder straps and sternum strap for extra comfort
• Rubber drag handle
• Metal grommet at bottom of pack for drainage