The steel ones that we used on our RSR are:
Rears from Restoration design - correct for the year are the early Turbo flares (for the small torsion bar holes).
Fronts are 74-89 front add on flares to original 69 fenders and then the extensions for the early flares were custom made. You can see in these two photos. (the extension is in bare metal)
The wide RSR flares (vented) I have never seen in metal as an after market add on... sorry
