Hi, yes in late 2011 through 2012 the low chassis was an option, but I don't believe many we're built in that specification so will be possibly harder to find.
How about fitting a Hyper Pro lower spring kit for the front and rear shock absorbers. This gives you more scope at finding a great spec Rallye without the Black and uncomfortable low seat that comes with the low chassis from factory.
There are 3 at a dealer near you I believe!! AJ BMW, ask for Steve and try one for size.
All the best