Any competent TIG welder should be able to do this no problem. I've done this on at least half a dozen frames, and to my knowledge all of them are still on the road. I didn't personally know two of the owners of these frames, so I can't guarantee they are still going strong, but the rest of them I see on a fairly regular basis and they often thank me for saving their frame. Also this really shouldn't mess with the aesthetics (I know you don't care) other than messing up the paint. I'd like to reiterate this is an EASY fix for a decent welder. Hell I MIG welded at least three dropouts together and I know they are all still being ridden years later. I'd estimate the cost to be $50-100 or 1 to 2 hours of labor. I charged a buddy a case of beer to fix his one time and it took about 20 min.