Scroll down to 4th item from the bottom.
http://www.hoffmanswinnerscircle.com/21_transmission.htm
Is that what you need? If so, you'll need to purchase it through one of Hoffman's many vendors. Hoffman's Winners Circle Retail Vendor List
He makes stuff. Lots of cool stuff. But he doesn't sell direct retail.
And I've purchased plenty of it as I returned my engine compartment to "1970" and made repairs, etc.Wow they have some cool stuff!!