Options/Packages Which Never Made it to Production?

This pic of a Challenger Aquarius came from Barry's www.hamtramck-historical.com 'site before he had to take the engineering drawings down at Chrysler's request. I'm fascinated by these "cancelled" packages and options which never made it to production and am wondering if there were any other packages/option such as this which had proof they existed, but never made it to production?