Sorry for the delay guys. Got sidelined on another shiny object.
Here are some measurements that I took and I tried to get a picture of the mounts. I hope they help. They weren't too bad to fabricate. I just used some flat stock and welded a short piece down from the mount to support the bottom side of the bag.
I drilled holes in the bag to line up with the rear bolt hole on the bike and mount, the other one simply bolts into the sheet of steel and then the steel uses another bolt to mount to the bike. It's a little wonky to remove, but not terrible.
Not the best pic, but you can see that the front fender bolt only goes to the metal plate, and then the original front bag bolt hole is slightly below that. I welded a nut onto the metal plate so that I didn't have to dink with it every time. I just run the bolt from the inside and bolt the bag to the sheet.
I drilled a new hole in the bag for the rear bolt to line up with the hole in the fender mount. You can also see the metal piece that I welded down from the upper piece. This helps support the bottom part of the bag and keep it from tipping in toward the wheel. The bag still had a bit of a bounce, so I drilled the lower part and put a small bolt in there as well. It greatly helped support the bags.
One of the big issues was making sure that the lids didn't hit anything when you opened them. As they are, they clear the seat and the bracket. They just barely rub the fender when opened, but not by much. I also like these bags as they have a push button to open them, instead of the dual clips as most Road King bags have.
To help space the mounts out a little from the fender, I used some collars like this one
http://www.emmett-enterprises.com/images/SHAFT-COLLARS.jpg. Sorry, but I don't remember exactly what size I used, but they are just slightly larger than the bolt that goes into the fender and, I needed to grind just a little off the edges so that they would fit down flat on the fender brace.
I know, a LOT of generalities, but it has been a little bit since I fabbed this up and my mind has been fried lately. If ya have any questions or want more info, feel free to let me know. Hope this helps! And remember, the bags and the exhaust move together, so they never get any closer than what they are shown in the pic below.