RC Industries Underbody Box F-Series 60x18x18 .125 Smooth Aluminum With Stainless Steel Barn Door Gloss White Roadside Model FX601818.KD Add-on Low Matte CURT has the answer

CURT has the answer

6" Handle Model 29520

Addictive Desert Designs 19 - 23 RAM 2500/3500 Bomber HD Rear Bumper Model R560051280103

and they are also sized to allow you to mount two of them side by side

000 lbs Model 25330

RC Industries Underbody Box F-Series 60x18x18 .125 Smooth Aluminum With Stainless Steel Barn Door Gloss White Roadside Model FX601818.KD Add-on Low Matte CURT has the answerRC Industries Underbody Box F Series 60x18x18 . 125 Smooth Aluminum With Stainless Steel Barn Door Gloss White Roadside Model FX601818. KD The RC Industries F Series is a premium underbody storage solution designed for maximum accessibility and extreme durability. Featuring a "Barn Door" configuration, these boxes utilize double side swinging doors with no center post, providing an completely unobstructed opening for loading and unloading large tools