Clutch fork needed, info!

Im using a 9" clutch on my 833OD and have a bellhousing with the ball pivot on it and I cannot seem to find the right size fork for it. I was told I would need a 12 3/4 inch fork but all I can seem to find is 12 1/2 with the ball pivot. Pulling the bellhousing would be too much work in the opposite direction

Anybody know where I can find the right size fork with the ball pivot?

or if a 12 1/2 will work?