I do know a fantastic fab-man that goes by coolwelder62 on here. I would bet he can hook you up. I had him build one for a 67 rs I am slowly doing. Had it powdercoated and the fit and finish is perfect! I know he built several for himself and a few others. He may sell you the plans or whatever it takes to build one. Send him a pm or look him up in the book under Chubby's Welding in Baldwin City, Kansas. Pretty sure I can find a picture or 3 if you want to see one. Good luck!
Rusty