Anyone know where to go to buy used floating docks? I have about 40--55 gallon plasic barrels, thinking about building my own, but want the stainless corners, treated wood, hinges, etc...pretty expensive, thought it might be easier to just buy a used one, but don't know where to look. Or is there an outfit in SE Kansas that would build one. Where does the State lakes get theirs? thanks for any info!