[wigiv]

Certainly - the companies (mostly in China) that manufacture containers will do one-offs. They can be specified with less toxic epoxies and composite/alternative flooring, and any cutouts or other features you want to end up with. This avenue is expensive though. You don't have the economies of scale in comparison to "standard models" pumped out by the tens of thousands, and you don't have the advantage of shipping the container over full of goods instead of empty. Caveats abound, of course.

If one wants to avoid stripping paint and floors out of secondary market boxes, it's also possible to buy the constituent pieces of a shipping container individually - the corrugated sidewalls, doors + fittings, floor channels, corner castings etc - unfinished or with primer only. In this way, you can ship one or more deconstructed shipping containers INSIDE a shipping container! But then you have to fixture it and weld it etc, so you're back to losing economy of scale...

For our purposes, we usually use 1-trip/low-trip for client projects avoiding the nasty ones by careful selection, and we have a custom machine that media blasts the interior and exterior down to bare metal when we work with older WWT and partial/damaged containers of unknown heritage.