I believe I have one for a car. Has a metal panel attached to the rear of the clamshell for mounting. I can probably cut this panel out as it's not needed for a truck side mount but hate to destroy it because it is so nice and someone may need it. Would prefer the truck specific mount for preservation sake. Figuring out how to use the forum so not sure if you've posted a picture or not? If can't find one for truck believe I could adapt.