I need some additional lockable storage for my 2002 Supercrew. Any suggestions?

With a white truck the best looking one seems to be the black powdercoated UWS.

 

I have always been a fan of the DeeZee toolboxes. They are a bit more pricier, but great quality. My friend actually has a black powdercoated DeeZee crossover box in his black Silverado. I do not have a crossover box, but have a wheel well toolbox that goes over the wheel well, because I do not have enough tools for a crossover, and also wanted more space in the bed lengthwise. We both got our boxes and he has gotten other boxes from a store in Des Moines, Iowa that specializes in blemished boxes (still amazing condition though), but you can also pick DeeZee boxes up at places like O'Reillys and other stores.

 

Love my toolbox ... and my truck is white...

my truck

 

The store I deal with has boxes that mount into the hitch. Will give you more room in the bed.