Picked up this Lester made for the F2/3 and 78-79 Comstar equipped GL1000's with the 5 bolt brake rotors for $300 shipped. Not the smoking deal I got on the 750F rear Lester that is on my bike now, but still I am satisfied with the price.
The 6 bolt Lester I am using now came off my '75 550F and I had to split up the set that had been on that bike to use use it. With the 5 bolt wheel I can put the 6 bolt back into my parts stash and save it for a future 550 or 750K project should one turn up.