I have looked out an old Steed parts list which shows the governor parts in exploded view. I had the same problem with my Steed in that the aluminium air vane on the governor arm was broken off. My pet theory is that it is held in the airstream by a spring and when this weakens the vane touches the fans and it snaps off. You can see from the photo that it is virtually square with an upturned end.
The rubber grips that you are looking for are not made any more and so far I have been unsuccessful in locating a decent looking replacement. They are used on just about every Trusty product from the Earthquake to the Road Roller so there’s an opening for somebody to start re-manufacturing them (hint, hint!). I the meantime I have been making some in wood for my machines and they do look quite realistic when painted black; don’t just use one coat of black paint, use blackboard matt black then three or four coats of semi-matt clear varnish. The resulting finish looks more like the original rubber and looks older.
The parts list that I have is a repro from B.J.Sims and is very useful for identifying parts that are missing on a project like this.
