Check out that link, the part number is toward the lower part. I don't know if Mcleod has updated it with the new number or not, but they did have the SC part number on their website in the online cataloge.
The #563203 is for the 11.0" pre-94 clutch. I believe 564203 is the number for the 11.5" later clutch. I think the early one was discontinued due to the later one working for both years. They are available from Fairway Ford Motorsports.
These guys are right across the street from Mcleod and have given TBSCEC members the flywheel for $347 + shipping. I believe it is a special order though.