The problem with the Trek headbadge (if it's the one from the early 80s that I have, on a frame) is that it was applied with adhesive, not rivets, so they're not easy to remove without messing them up. The design is simple enough -- there's someone around who does custom headbadges. I'll bet if you got the graphics, someone could laser cut or etch a beautiful replica on brass, and then bend it over a mandrel just slightly smaller than the headtube. It's filled with black.