Seems to me if you want a wide neck, get a 2015 SG Standard on the used market.
Gibson got so much flak for issuing those, it was like a sh*t storm in 2015.
That's the guitar model with all the "innovatiions". Gibson called the wide neck their "soloist" neck.
Look it up, it's probably close to what you want.
That one also had the robot tuners and the zero fret nut made of soft metal.
They did the same with the 2015 Les Pauls... I never went over to MLP to see what the
consensus over there was on the subject of Gibson's new ideas, but I'm sure it was scathing.
The prices on the used market might reflect how much everyone seemed to hate those
models. ...might not.
But those were lovely to look at, in spite of all this. Most people replaced the metal nut
(which was an excellent idea, just too soft) with Gibson's titanium nut, which was given free
to original owners of 2015s. The zero fret nut was adjustable and it was a very good idea.
But narrow minded guitarists couldn't stand the idea, and Gibson stopped pushing it.
Most people replaced the robot tuners with regular ones... leaving them with a starkly beautiful
SG with a wide neck. I'll bet you could find one modded like that on the used market.
Tusq makes a replacement nut too.