Here's the Bonneville Seats I had recovered by www.leatherseats.com in Oklahoma.. They matched the leather of the Roadmaster after making patterns of the Bonny 12 ways...
The Fronts
The Bottom of the Fronts
The Top of the Backs
One note, the leather isn't as tight as the Bonnys, you have to specify that I guess...
Here's the backs...
With the cupholer showing
With it closed..
Note they forgot the ribs in the headrests.. Not a big deal in the RM wagon, would have been a problem in an SS...