I need brackets that attach to the truck to secure the TC?

Another vote for Torklift.

I have the Torklift Talons, an all aluminum bracket system.

They are super light weight, yet extremely strong. They use very thick aluminum, as well as being attached and braced directly to the truck frame. My camper is extremely heavy, and I've had no issues with slippage what so ever.

In addition to the Talons, you'll also want to get their Torklift Fastguns, the turnbuckles that are quick-release and lockable with the Fastgun Locks.

Why would you want to lock your turnbuckles you ask? Couple reasons--eliminate the (very unlikely) possibility of them popping loose, but also to keep someone from "borrowing' your fancy new camper tie down system.

Here you go, put in your specific truck style: https://www.etrailer.com/tiedown-2001_Dodge_Ram+Pickup.htm

Another vote for tork lift. You can install them yourself very easily and they secure to the frame of the truck. Super secure.

Your going to get varied opinions but as was stated there are only two, as mentioned. I went with TorkLift as with HJ's you have to drill 16 holes, that wasn't my cup of tea.

Torklifts' frame mounts are better then the Happijack bed mounts with a larger camper such as yours.

TorkLift makes the tie downs you are looking for.

Torklift or Happijac are your main options. Just add .com to either of those and check them out.