Ok there were a ton of aftermarket companies that offered these kits. However, in one of my old refereance books there was a referance to a 1970 Mustang Sportsroof vinyl roof molding and hardware from the factory as a special order.
It was a 3/4 vinyl roof that came up from "A" pillers to the end of the qrt windows. It had a four part chrome strip trim set #517B59 & #517B58 & #517A62 (2). The roof vinyl itself was #A53700. It was held in place with 6 clips #C7SZ-6540248-B, and screws #52413-S
I show it as a 1970 option only, however, it could be that it was offered by Ford as a dealer installed option earlier, but I cannot find any notes regarding that.
This is the drawing from the book:
View attachment 266075