I've been looking for something like that for ages. In fact, I'd settle for a 1-3/4" nut width. About the only ones I can come up with are Eastman archtops and thinline electrics, which are 1-3/4".
2013 Jeff Medlin '37 Hauser 640mm sp
2006 Michele Della Guistina Concert 10 string 650mm ce
2005 Jose Ramirez 4E 650mm ce
2005 Manuel Rodriguez Model C3F 650mm sp
2003 Manuel Rodriguez Model D 650mm ce
As an amateur builder I have made a couple of steel strings aimed firmly at the finger picking player - perhaps at the converting classical player also. I make the neck at the nut around 47 mm with a fretboard curvature of 16 inches. This is a bit of a compromise between the classical at around 52 - 54 mm at the nut and a flat fretboard, although I radius my classicals at 20 inches and find it more comfortable than the flat one.
The electric though really is a rather different animal. I am not sure that the classical style of neck dimensions would work very well. It may be though that the sort of figures I suggest for a steel string could work reasonably well. Bear in mind that the normal electric playing technique is worlds away from either classical or steel string playing.
In any case a guitar maker who does bespoke work ought to be able to make whatever you decide is worth trying.