Too much of that bike is stock for a Nightster for it not to really be one... You did notice the speedo, and the seat (me too obviously), but the paint, fork-gaiters, ride-height, and tail-light set-up are all stock for a Nightster.
If I didn't have one already...I'd be emailing the guy!!!
No rsp from the dude yet. I am sure he is getting lots of messages for that price.