I would try some of the main adventure bike aftermarket suppliers.
Twisted throttle has lots of great stuff. As for the crash bar, you can find it available under the V-strom accessories on the Suzuki website. Or, as many others have pointed out on this site (just search around), you can replace it with a nicer aftermarket one for less. I personally have the AltRider crashbars and skid plate and love them, but there are several choices out there.
For the body plastics, I am sure you will have to go to the dealer. I know that several accessories for the pre-'12 bike will fit the 2012 model, but many have not been tested yet.
2012 DL650AL2 - Touratech side racks and top rack with zega pro panniers (38L and 45L) and top case with rapid trap system (38L); Richland Rick mirror extenders, kickstand foot, and fork brace; Altrider crash bars and skid plate; Vehicle Artz reflective orange rim tape; SW-Motech centerstand; Prototype Saddleman adventure seat; Oxford handlebar muffs; Thule bicycle rack.
Future thoughts: Windscreen? Exhaust? Hand guards? Heated grips? Accessory power? GPS Mount?