Apparently, Revell has been considering making a G body Cutlass model for some time. I seem to remember someone on this site allowing Revell to use their car for scaling (88Hurstolds maybe?). Anyway, you can show your support by casting your vote on their site. Check out the link below.
http://ideas.revell.de/ideas/item/2756/
http://ideas.revell.de/ideas/item/2756/