I can testify firsthand that a k110 fits in the pro jr., though I had to remove the chassis from the cabinet to get it in there. Think the e110 is comparable depth, if not even a hair less deep. As for Jerry tone, it definitely gets you closer than the stock speaker, but you're still limited by two factors, at least. 1) It's an el84 amp, which means it has a less classically Fendery voice to start with. It's not a real blackfacey kind of amp, though it does sound sweet in it's way. 2) single tone knob limits ability to dump bass and pump up highs, a la Jerry. An Eq pedal may help here.
Hope that helps.