Buy bed bolts elsewhere?

[bigmoe]

Sometime this winter I will be buying bed wood, etc., for my truck. I'm going with polished strips and bolts. I've been pricing out stuff from the various usual suppliers of bed wood. I'm wondering if there might be some savings to source the bolts from elsewhere. I did a quick look for s/s carriage bolts on line and found some at a pretty good price. They aren't polished s/s though. Has anyone ever sourced the hardware from other sources other than bed wood suppliers? Has anyone ever tried polishing s/s carriage bolt heads?