Trying to locate this part for DH. We don't know exactly what it's called and having the hardest time locating it! Any ideas?

 

I have no idea what the part is, but it would be helpful if you could tell us more about where it goes on the truck. At first glance I would say that it looks like it goes on the rear axle if I am correct in thinking that the spring is part of the emergency brake cable assembly. Also the year of the truck would be very helpful in getting the part identified.

 

That is the caliper mount for the rear brakes. It also has the parking brake cable attached. Looks like the backing plate is missing