So if I understand correctly you want to fill the space left when you removed the back rest? I had the same issue. I had to buy a whole new grab rail. To my knowledge Yamaha does not make a filler grab rail for that. I wish they did it would have saved me some money. Thank God for ebay.
You are correct jeff. I have a virago bar I would trade for the stock upright if he wanted. As far as that goes I would even trade one of my chromed stock bars for the complete backrest.