Where can I find the diamond plated covers (box) that cover the pipes in the bed of the truck? They look kind of like the tool boxes, only they aren't as deep.

 

I believe you have to make them yourself. Hit the steel supply yard, ask for a piece of diamond plate aluminum, and ask them to bend it for you. Of course you'll need the dimensions beforehand.

 

I honestly would not go aluminium if you want my opinion.
I would get steel (may cost more) because you never know when you are going to slam a cinder block in the bed and it slides up and smacks the box and puts a nasty bend in it.
Also, if you have a sawzall (spelling sorry) and a welder you could easily make one on your own and save a penny or two.
Just my $0.02
Wheelo

 

Had this one bent at the local sheet metal shop and then drilled to holes to slide over the stacks.

https://www.dieseltruckresource.com/...cat=500&page=1