I am in the process of returning the Bill Clawson 68 A/S Mustang to original as we built it in 67/68. When I bought the car in 2019 it had a Kirkey aluminum roundy round seat in it which is totally period incorrect and have removed it. I read somewhere that there is someone making a R Model reproduction seat but cannot located the source. Any help that way would be appreciated. I have a original NOS Mark Donahue seat that I bought back in the day but 50 years later the seat has shrunk and its just a little to narrow for me now. It appears Kirkey does have a low back aluminum seat but I thought I would try to find a original style one first.