Bagged Sbob, I would imaging that with the right fab work, you could mount the Street Glide fairing to the Street Bob mid-glide front end. I also think, it might take a little less fab work getting it to mount to the wide trees used on the Fat Bob when running a single light like I have. Key to this issue is all the fab work you would need to put into it to make it fit.
Using the wide trees of a Fat Bob and the tri-light bar with the detachable windscreen points adapted from a heritage to the setup (like AFM did), you could use the detachable aftermarket batwing fairings made to mount to the Heritage or Deluxe.