There is a local shop that has this system. I dont remember the details but it's basically a foot wide strip of steel that is curved. You hook the dropouts and pull on the steer tube. There are some videos from the 80's of some big Italian shops showing this technique. Can't find them...
That's how we did it at Trek. I prefer the look of a blade that curves all the way to the dropout, though, so I bend them before brazing on my bikes.