That ball pivot adapter can be duplicated by anyone with the unmitigated gall to call himself a "machinist". Cutting the radius for the torque tube ball to pivot into would be a bit tricky, but everything else is just basic machine work- - - -including shortening the output shaft and re-splining it. It would even be possible to cut the back end off an original torque tube type transmission extension housing and graft it onto a Saginaw extension housing flange.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!