Guess what Bandai is releasing at 1:1700 scale:
I wouldn't really want to play it, but heck, if you need a commercially available kit of a Star Destroyer that looks like the filming miniature, is fully lit, and is over three feet long, and snap-together, then I'd say your prayers have been answered.
More on this in the 2014 Tokyo toy show (mostly just a bigger, more complete picture):
http://timelessdimension0.blogspot.pt/2014/06/2014-tokyo-toys-show-2014.html
Edited by Millennium Falsehood