You can spread your bag rails out some at the rear where you need it. I made a set to accomodate my Mustang saddlebags I put on. With the mounts I modified for the bags, it made the bags stick out just a little bit more than the regular OEM saddlebags do......so I made the spacers. They're 1 1/4".
Here's a couple pics to show you the finished product......





I made and cut the spacers out of a 3 foot piece of 5/8" round bar (I got the round bar at either Home Depot or Lowe's.....don't remember which, but it was definitely one of those two places) and some stainless tubing I found on ebay.
You might could find some (either the round bar or the stainless tubing) at McMaster Carr or Grainger, but about the easiest source I found for the stainless tubing was on ebay. The stainless from the guy on ebay comes in 1 foot sections. I just ordered two pieces to play with from him. This is exactly what I bought (Stainless Steel 316L Round Tubing, 3/4" OD, 0.065" Wall, 12" Length) and from the guy I got it from.......
http://www.ebay.com/itm/Stainless-Steel-316L-Round-Tubing-3-4-OD-0-065-Wall-12-Length-/110775382445?pt=LH_DefaultDomain_0&hash=item19caba31adThe stainless matches up with the chrome rails pretty good. I originally thought about and had planned to polish the stainless to better match 'em up to the chrome, but after I mounted everything together, they looked pretty good as they were and I decided not to polish the stainless after all. Nobody has ever noticed until I point out the spacers to them.

I don't have any pics of the finished spacers
before I installed them, but to give you an idea, here's a pic of the first set I made (these were too long and I had to cut more round bar to drill the holes at different spacing).....
