Been there, tried it, failed! But it did help one of my music tech students get a first for his degree!
Bottom line is that however good rotary DSP effects get, or however you sample a leslie, NOTHING comes close to the real thing, as it simply isn't shifting air, and there are no room effects producing multiple conflicting doppler shifts, as well as the accompanying volume and tonal shifts.
You can get close to the sound of a miked up leslie, which is what gizmos like The Vent do, but there's nothing that will let you close your eyes and imagine yourself standing in a room or studio, six feet away from a 147 or 122.