So this seems to exist:
It was created via the LEGO CUUSOO project. Anyone can pitch a kit idea, and if it gets 10,000 supporters, LEGO might make it. It's like a LEGO version of Kickstarter, except supporting ideas has no financial risk nor inevitable disappointment associated with it.
Moreover, if your kit gets made, you get 1% of the net product sales. Pretty awesome.
Here's the original DeLorean project on CUUSOO that achieved product status.
Or direct from LEGO.
Very close to making this an early Christmas present to myself...