best place to buy a weld in tag box

since im redoing my whole truck since it got a hit and run on the ass end i was wanting to put in a tag box on the ass end right where the crease was right in the body line cause i think thats the easiest way to fix it casue its going to be a bitch to get out of that body line and i dont want to put a new skin in because i complete welded the whole bed shut for a clean look and i figure that would just be as big as a bitch and plus im tired of having my tag in my rear window kinda looks cheasy on the inside and i dont want a rear lexan window either so i anyways telling u guys that B.S where is the best palce to buy a weld in tag box. Iknow some companies are shit here not nameing any im sure u guys know of them.thanks alot