I'm gonna avoid the whole Flareside argument here.

I'm thinking one from a compact truck would work though, don't know, just putting it out there. I'm out.

 

I have an 04 flareside extended cab which is also called a step side to some people. The styleside doesn't have the steps on the side of the bed like the flareside/stepside does. Here is a link that may be helpful.

https://www.fleet.ford.com/truckbbas...2004/f150.html

I am also looking for a black toolbox so I will update if I find anything. So far I have a possible lead on one from Craigslist.

 

I have a Duralast box from Autozone in my 01 Flareside.

 

hers mine i love it sits in the bed nice.

 

Allow me to clear up the confusion:

FORD - FLARESIDE
FORD - STYLESIDE

CHEVY - STEPSIDE
CHEVY - FLEETSIDE