If anyone is interested, the Kalibur KF1-L fender mount fits (can be made to fit) my 2015 EL on the driver's side. I have only quick-fitted the mount to see if it will work and have not hard installed it yet. You will have to drill holes as it doesn't line up with any of the fender bolts. The problem might be with the lip of the hood as it closes. There appears to be enough gap from cutting the cable but extra protection around the coax will be necessary.
This is on my to-do list to remove the Lil' Will antenna that only provides barely satisfactory performance and no matter what I do I can't get any better than about a 1.8 SWR in the middle of the CB bands. I run a fender mount on my 2013 Wrangler using a 2' Firestik on a 4" spring with good results. Since the EL is not garaged parked, I figure it will get a 3' Firestik.