Pond Boss Forums POND CONSTRUCTION Creating habitat Floating Dock Hardware

I'm finalizing the design, and starting to shop for parts/pieces. Where should I check for hardware? I'll be needing corner braces, rollers, hinges, and brackets to allow the pier to slide on pipe that's driven into the pond bottom.

I'll be using 30 gallon barrels for flotation, 55 gallon barrels will make the dock/pier too wide (plans are for 48" width), with an 8' x 12" "T" on the end.