Google is your friend.
For specific info, this is the best place on the planet for stuff about the savage/Boulevard, but whenever I'm looking for generic info I jump on google. A quick search for "windshield for Suzuki Savage/Boulevard) will get you hundreds of pictures.
I have heard from about a dozen people that the OEM shield is a good choice. SlipStreamer and National Cycle both make shields with hardware kits specifically for the Savage/Boulevard. Personally, I was looking at the National Cycle N2220 Custom Heavy Duty Clear Windshield for Narrow Frame Cruisers for my '03 Savage. Then you need to buy the proper hardware kit to mount it. It wont be cheap.
Memphis Shades is a windshield maker that I am less familiar with, but they get fairly good consumer reviews on Amazon and their windscreens come complete with all the hardware. If you like a sportier shield, that might be the way to go. Example in the link below.
http://www.amazon.com/MEMPHIS-SHADES-METRIC-MEM-DEMONBLACK/dp/B002WKE7LY/ref=...