Hot Rods mercury clutch

I'm putting a 1949 merc motor in my roadster with a 39 top loader trans but the merc clutch disc spline doesn't match I need a 9 and a half inch disc with 10 spline x 1-3/8 and can't find one does anybody know who makes that combo , I've found 9,10, 10 and a half , and 11 but no 9 a half

 

Try Fort Wayne Clutch and ask for Lou.

 

Check your local parts house: '63 F100 6cyl std 3spd disc should get you in the ballpark.

 

That took me more time than I should have spent.
What it amounts to is a 49/53 passenger car disk at 9-1/2 with a truck hub at 10 x 1-3/8
The Truck clutch having a 10 inch disk.
Looking in my 45 Motor manual Ford didn't have a 9-1/2 inch disk until 49.