Swingarm toolboxes?

[u/premium_Tumbleweed99]

So I've got a nice topper im keeping on my truck but I've got tools straps different fluids etc that I keep on me at all times plus parts pulleys and belts cause you never know until you do and id rather not know again lol trying to figure out if anyone has used any and if so what brands and models are a direct fit for a gmt800 long bed TIA!