That is not helpful because toolbox's are only listed by dimensions, rather than vehicle application. Also, some of the listed dimensions don't always match up to what the actual product comes as. Then there's situations like the box that I linked a few posts ago. The website for the manufacturer lists it as a 68" box. Just googling the part number for it brings up a slew of websites that call it a 67" box. So which is it? What are the actual dimensions?

That's why I asked if anyone knew with certainty, a toolbox that properly fits the flareside bed.

 

I have the Husky 69" I believe for my flareside. It's made to fit midsize trucks but obviously with our more narrow bed it fit like a glove.

 

Okay, well since I found a solution that works for me, I wanted to come back and update this thread to let anyone else know what discovered. I purchased the UWS Blue Series Single Lid Box, part number TBSD69. It can be found at a variety of places but I purchased mine from Amazon as it somehow was the cheapest.
It was just a little too wide and required me to trim the moldings on top of my bed.




However, after that, and with just a small amount of persuasion from a pry bar, it dropped right into place.



I have been very happy ever since. My truck bed finally stays clean, and I can store chains, gas cans, tools, tie downs, and all the other things I need in a semi-organized fashion. For reference, my truck is a 1997 F150 Lariat with the flareside bed.