I do know where you can get one.I have one in the shed.I bought a new Mitchell a few years ago for my early 30,oval speedo car,then my house burned with the car in it before I put the OD in.I replaced the car with a late 31,and had to buy the correct one for the round speedo.You can buy one from Mitchell,a couple of years ago I paid about $80.for it.I think if you look at the ads here you will find my ad still there.Nobody ever bought it.It is still in the box.